• Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

[SOLVED] Need help to get more juice from a 2500K

Joined
Feb 7, 2008
Messages
682 (0.12/day)
Location
Barcelona, Catalonia, Spain
System Name The Phoenix (rev. 3.0)
Processor Intel Core i9 9900K @ 4.9GHz (1.18V)
Motherboard ASUS TUF Z390 PRO-GAMING
Cooling Custom Full Loop w/EKWB & Swiftech components
Memory 32GB Corsair Vengeance RGB Pro 3200MHz (C15)
Video Card(s) MSI GTX 1080 SeaHawk X EK @ 2.15GHz/5.5GHz
Storage Samsung 970 EVO+ (2x500GB) + Toshiba X300 (4TB)
Display(s) LG 29UM65-P (2560x1080 @ 75 Hz)
Case Thermaltake Core V51
Audio Device(s) Razer Kraken 7.1 & Scarlett 2i4 w/M-AUDIO BX5-D2
Power Supply Corsair RM750 (ver. 2019)
Mouse Logitech G700s
Keyboard Razer Blackwidow Chroma V2
Software MacOS 10.13.6 "High Sierra" & Windows 10 Pro x64
Hello everybody! Long time no posting since I was kinda disconnected from the OC world and assembling parts, though that ... the itch never dies so here I am. After a long search these last weeks and see benchmarks/reviews I saw no real point "yet" to change my motherboard, CPU or RAM. I certainly did with the GPU and monitor, switched from a HD6850 to a GTX770 and got an LG29UM65.

Thing is I'm quite happy with the result, but I want a lil bit of extra juice. My 2500K was running 4.1GHz since almost first day with stock voltages (1.260V idle - 1.248V load) and to barely match my speeds with the new architecture I know I had to push it further. Right now is at 4.2GHz stabilized but i'm hitting a wall and certainly IDK if the CPU needs more VCore or more tuning in other stuff.

Here are the results:

4.2GHz (42x100)

VCore: 1.296V idle - 1.284V load - 1.272V super-hard load (with IBT or Large-FFTs at some points)
VTT: 1.125V (read in some places 1.075V is intel max but can be pushed till 1.2V)
VccSA: 0.975V (set at intel Max)
PLL: 1.840V
DRAM: 1.655V
DRAM Performance: Extreme
Turbo: Disabled (running always at 42x)
C-States: Disabled
CPU PLL Overvolt: Disabled

Tests passed

Prime95 (Small FFTs) - 1h
Prime95 (Large FFTs) - 1h30min
Prime95 (Blend Test) - 1h + 1h30min
Linpack (AVX Enabled - 90% memory) - 1h + 1h30min
OCCT (Big quantity of data) - 1h + 1h30min
AIDA64 (CPU + FPU + Cache + RAM) - 1h
OCCT GPU (2560x1080 - Check Error - 2048MB) - 20min
3DMark11 - 5 runs
Normal desktop stuff (browsing, watching videos, listening music)
Gaming Assetto Corsa for 3 hours

However, for getting 4.3GHz i'm not able to stabilize it on Large-FFTs or OCCT CPU neither pushing 1.89V at PLL and/or nearly 1.2V to VTT ... and with 1.308V on load at the cores. So, what should I do, trying to push a lil bit more CPU VCore? Try to adjust VTT and PLL to a "sweet" spot? Decrease RAM performance to a lower value? I'm kinda lost.

Most "amazing" thing is it was able to pass LinPack and SmallFFTs with 1.296V but Blend, Large-FFTs or OCCT CPU are not even wanting to do with 1.308V and all the other voltages (VTT & PLL) raised with the usual 0x124 BSOD. Is it normal that can do 4.2GHz totally stable at 1.284V and having to up till 1.32V maybe to get 4.3GHz? Sounds a lil bit strange but I'm waiting for your answers.

Thanks in advance.

PS: You can check my specs to get more info
 

eidairaman1

The Exiled Airman
Joined
Jul 2, 2007
Messages
40,435 (6.61/day)
Location
Republic of Texas (True Patriot)
System Name PCGOD
Processor AMD FX 8350@ 5.0GHz
Motherboard Asus TUF 990FX Sabertooth R2 2901 Bios
Cooling Scythe Ashura, 2×BitFenix 230mm Spectre Pro LED (Blue,Green), 2x BitFenix 140mm Spectre Pro LED
Memory 16 GB Gskill Ripjaws X 2133 (2400 OC, 10-10-12-20-20, 1T, 1.65V)
Video Card(s) AMD Radeon 290 Sapphire Vapor-X
Storage Samsung 840 Pro 256GB, WD Velociraptor 1TB
Display(s) NEC Multisync LCD 1700V (Display Port Adapter)
Case AeroCool Xpredator Evil Blue Edition
Audio Device(s) Creative Labs Sound Blaster ZxR
Power Supply Seasonic 1250 XM2 Series (XP3)
Mouse Roccat Kone XTD
Keyboard Roccat Ryos MK Pro
Software Windows 7 Pro 64
youve hit the physical limit of that motherboard/chip, you might need direct cooling for your VRMs.

CPU overclocking is like a box of chocolates, you don't know what you gonna get.
 

Ahhzz

Moderator
Staff member
Joined
Feb 27, 2008
Messages
8,709 (1.48/day)
System Name OrangeHaze / Silence
Processor i7-13700KF / i5-10400 /
Motherboard ROG STRIX Z690-E / MSI Z490 A-Pro Motherboard
Cooling Corsair H75 / TT ToughAir 510
Memory 64Gb GSkill Trident Z5 / 32GB Team Dark Za 3600
Video Card(s) Palit GeForce RTX 2070 / Sapphire R9 290 Vapor-X 4Gb
Storage Hynix Plat P41 2Tb\Samsung MZVL21 1Tb / Samsung 980 Pro 1Tb
Display(s) 22" Dell Wide/24" Asus
Case Lian Li PC-101 ATX custom mod / Antec Lanboy Air Black & Blue
Audio Device(s) SB Audigy 7.1
Power Supply Corsair Enthusiast TX750
Mouse Logitech G502 Lightspeed Wireless / Logitech G502 Proteus Spectrum
Keyboard K68 RGB — CHERRY® MX Red
Software Win10 Pro \ RIP:Win 7 Ult 64 bit
Hello everybody! Long time no posting since I was kinda disconnected from the OC world and assembling parts, though that ... the itch never dies so here I am. After a long search these last weeks and see benchmarks/reviews I saw no real point "yet" to change my motherboard, CPU or RAM. I certainly did with the GPU and monitor, switched from a HD6850 to a GTX770 and got an LG29UM65.

Thing is I'm quite happy with the result, but I want a lil bit of extra juice. My 2500K was running 4.1GHz since almost first day with stock voltages (1.260V idle - 1.248V load) and to barely match my speeds with the new architecture I know I had to push it further. Right now is at 4.2GHz stabilized but i'm hitting a wall and certainly IDK if the CPU needs more VCore or more tuning in other stuff.

Here are the results:

4.2GHz (42x100)

VCore: 1.296V idle - 1.284V load - 1.272V super-hard load (with IBT or Large-FFTs at some points)
VTT: 1.125V (read in some places 1.075V is intel max but can be pushed till 1.2V)
VccSA: 0.975V (set at intel Max)
PLL: 1.840V
DRAM: 1.655V
DRAM Performance: Extreme
Turbo: Disabled (running always at 42x)
C-States: Disabled
CPU PLL Overvolt: Disabled

Tests passed

Prime95 (Small FFTs) - 1h
Prime95 (Large FFTs) - 1h30min
Prime95 (Blend Test) - 1h + 1h30min
Linpack (AVX Enabled - 90% memory) - 1h + 1h30min
OCCT (Big quantity of data) - 1h + 1h30min
AIDA64 (CPU + FPU + Cache + RAM) - 1h
OCCT GPU (2560x1080 - Check Error - 2048MB) - 20min
3DMark11 - 5 runs
Normal desktop stuff (browsing, watching videos, listening music)
Gaming Assetto Corsa for 3 hours

However, for getting 4.3GHz i'm not able to stabilize it on Large-FFTs or OCCT CPU neither pushing 1.89V at PLL and/or nearly 1.2V to VTT ... and with 1.308V on load at the cores. So, what should I do, trying to push a lil bit more CPU VCore? Try to adjust VTT and PLL to a "sweet" spot? Decrease RAM performance to a lower value? I'm kinda lost.

Most "amazing" thing is it was able to pass LinPack and SmallFFTs with 1.296V but Blend, Large-FFTs or OCCT CPU are not even wanting to do with 1.308V and all the other voltages (VTT & PLL) raised with the usual 0x124 BSOD. Is it normal that can do 4.2GHz totally stable at 1.284V and having to up till 1.32V maybe to get 4.3GHz? Sounds a lil bit strange but I'm waiting for your answers.

Thanks in advance.

PS: You can check my specs to get more info
I'm also running a 2500k (altho I'm not running at 4.4 any longer), and am pleased with my RAM and motherboard, and also update my twin 6950s to a 2904gb, and happy with that. but, I would like to see where you go with your, since I was starting to get a little concerned that I might be falling behind by the end of the year, and really don't have the money to push up a level. So, basically, /subbed out of curiosity :)
 
Joined
Feb 7, 2008
Messages
682 (0.12/day)
Location
Barcelona, Catalonia, Spain
System Name The Phoenix (rev. 3.0)
Processor Intel Core i9 9900K @ 4.9GHz (1.18V)
Motherboard ASUS TUF Z390 PRO-GAMING
Cooling Custom Full Loop w/EKWB & Swiftech components
Memory 32GB Corsair Vengeance RGB Pro 3200MHz (C15)
Video Card(s) MSI GTX 1080 SeaHawk X EK @ 2.15GHz/5.5GHz
Storage Samsung 970 EVO+ (2x500GB) + Toshiba X300 (4TB)
Display(s) LG 29UM65-P (2560x1080 @ 75 Hz)
Case Thermaltake Core V51
Audio Device(s) Razer Kraken 7.1 & Scarlett 2i4 w/M-AUDIO BX5-D2
Power Supply Corsair RM750 (ver. 2019)
Mouse Logitech G700s
Keyboard Razer Blackwidow Chroma V2
Software MacOS 10.13.6 "High Sierra" & Windows 10 Pro x64
Well, these last days I was able to boot (also benching but in the past) at 4.4-4.5 to Windows with 1.32V, no stability of course but just to see if it was the chip and certainly it doesn't seems so. VRM's temps seems good and the PSU is also developing good voltages. I'm attaching a picture so you can see there's a good positive pressure in the case.

I really liked the "is like a box of chocolates" and I know it, been doing it for years but it seems strange to me that can't stabilize 4.3GHz (maybe all these years running 4.1GHz 24/7 degraded a lil bit the chip?) ... i'll try to push a lil more of VCore and see what happens but I don't want to go that high for just 4.3GHz though I know till 1.35V is safe. Any more suggestions?

Edit: Testing now at 1.308V idle - 1.296V load (4.3GHz) to post the tests that are passing

The old little beast:

 
Last edited:

rtwjunkie

PC Gaming Enthusiast
Supporter
Joined
Jul 25, 2008
Messages
13,909 (2.43/day)
Location
Louisiana -Laissez les bons temps rouler!
System Name Bayou Phantom
Processor Core i7-8700k 4.4Ghz @ 1.18v
Motherboard ASRock Z390 Phantom Gaming 6
Cooling All air: 2x140mm Fractal exhaust; 3x 140mm Cougar Intake; Enermax T40F Black CPU cooler
Memory 2x 16GB Mushkin Redline DDR-4 3200
Video Card(s) EVGA RTX 2080 Ti Xc
Storage 1x 500 MX500 SSD; 2x 6TB WD Black; 1x 4TB WD Black; 1x400GB VelRptr; 1x 4TB WD Blue storage (eSATA)
Display(s) HP 27q 27" IPS @ 2560 x 1440
Case Fractal Design Define R4 Black w/Titanium front -windowed
Audio Device(s) Soundblaster Z
Power Supply Seasonic X-850
Mouse Coolermaster Sentinel III (large palm grip!)
Keyboard Logitech G610 Orion mechanical (Cherry Brown switches)
Software Windows 10 Pro 64-bit (Start10 & Fences 3.0 installed)
@SirKeldon I don't think all the years running it at 4.1Ghz 24/7 degraded the chip. It's the voltage you use that could have had that effect. Your voltages seem a little high to me to have reached that mild overclock.
 
Joined
Feb 7, 2008
Messages
682 (0.12/day)
Location
Barcelona, Catalonia, Spain
System Name The Phoenix (rev. 3.0)
Processor Intel Core i9 9900K @ 4.9GHz (1.18V)
Motherboard ASUS TUF Z390 PRO-GAMING
Cooling Custom Full Loop w/EKWB & Swiftech components
Memory 32GB Corsair Vengeance RGB Pro 3200MHz (C15)
Video Card(s) MSI GTX 1080 SeaHawk X EK @ 2.15GHz/5.5GHz
Storage Samsung 970 EVO+ (2x500GB) + Toshiba X300 (4TB)
Display(s) LG 29UM65-P (2560x1080 @ 75 Hz)
Case Thermaltake Core V51
Audio Device(s) Razer Kraken 7.1 & Scarlett 2i4 w/M-AUDIO BX5-D2
Power Supply Corsair RM750 (ver. 2019)
Mouse Logitech G700s
Keyboard Razer Blackwidow Chroma V2
Software MacOS 10.13.6 "High Sierra" & Windows 10 Pro x64
@SirKeldon I don't think all the years running it at 4.1Ghz 24/7 degraded the chip. It's the voltage you use that could have had that effect. Your voltages seem a little high to me to have reached that mild overclock.

Quite true, since it did 4.1GHz from first day with 1.248V under load, anyway, never really wanted to push it till now fully stable and as eidaraman1 said ... every CPU is like a kind of lottery.

So guys after testing @ 4.3GHz (1.308V idle - 1.296V load - max droop: 1.284V // PLL 1.840V // VccSA 0.975V // VTT 1.125V) here are the results:

AIDA64 (CPU + FPU + Cache + RAM) - 20 mins - passed
Prime95 (Small FFTs) - 20 mins - passed
Prime95 (Large FFTs) - 0x124 BSOD after 1 min
Prime95 (Blend w/8192MB of RAM - 50%) - 0x124 BSOD after 2 mins
OCCT Linpack (AVX Enabled - 90% of memory) - 20 mins - passed
3DMark 2013 (Primary tests w/4 demos) - passed
OCCT CPU - Big quantity of data - 0x124 BSOD after 3 mins

So don't think it's a CPU limit, maybe the mobo physic limit? Any guesses on what to touch first? (I was thinking to adjust some PLL/VTT & DRAM performance before touching VCore but i'm open to any suggestions)

PS: peche, nice you liked the case, or at least it seemed so :D
 
Last edited:

rtwjunkie

PC Gaming Enthusiast
Supporter
Joined
Jul 25, 2008
Messages
13,909 (2.43/day)
Location
Louisiana -Laissez les bons temps rouler!
System Name Bayou Phantom
Processor Core i7-8700k 4.4Ghz @ 1.18v
Motherboard ASRock Z390 Phantom Gaming 6
Cooling All air: 2x140mm Fractal exhaust; 3x 140mm Cougar Intake; Enermax T40F Black CPU cooler
Memory 2x 16GB Mushkin Redline DDR-4 3200
Video Card(s) EVGA RTX 2080 Ti Xc
Storage 1x 500 MX500 SSD; 2x 6TB WD Black; 1x 4TB WD Black; 1x400GB VelRptr; 1x 4TB WD Blue storage (eSATA)
Display(s) HP 27q 27" IPS @ 2560 x 1440
Case Fractal Design Define R4 Black w/Titanium front -windowed
Audio Device(s) Soundblaster Z
Power Supply Seasonic X-850
Mouse Coolermaster Sentinel III (large palm grip!)
Keyboard Logitech G610 Orion mechanical (Cherry Brown switches)
Software Windows 10 Pro 64-bit (Start10 & Fences 3.0 installed)
How did you arrive at that PLL level from your first post? That seems really high! I'm going to have to check mine at home, but I don't think mine is set anywhere near as high, and I have virtually the same settings now on Ivy as I had on my Sandy Bridge, still with my same Z68 motherboard.

IgnoreThis post. Alarmism based on faulty memory.
 
Last edited:
Joined
Feb 7, 2008
Messages
682 (0.12/day)
Location
Barcelona, Catalonia, Spain
System Name The Phoenix (rev. 3.0)
Processor Intel Core i9 9900K @ 4.9GHz (1.18V)
Motherboard ASUS TUF Z390 PRO-GAMING
Cooling Custom Full Loop w/EKWB & Swiftech components
Memory 32GB Corsair Vengeance RGB Pro 3200MHz (C15)
Video Card(s) MSI GTX 1080 SeaHawk X EK @ 2.15GHz/5.5GHz
Storage Samsung 970 EVO+ (2x500GB) + Toshiba X300 (4TB)
Display(s) LG 29UM65-P (2560x1080 @ 75 Hz)
Case Thermaltake Core V51
Audio Device(s) Razer Kraken 7.1 & Scarlett 2i4 w/M-AUDIO BX5-D2
Power Supply Corsair RM750 (ver. 2019)
Mouse Logitech G700s
Keyboard Razer Blackwidow Chroma V2
Software MacOS 10.13.6 "High Sierra" & Windows 10 Pro x64
How did you arrive at that PLL level from your first post? That seems really high! I'm going to have to check mine at home, but I don't think mine is set anywhere near as high, and I have virtually the same settings now on Ivy as I had on my Sandy Bridge, still with my same Z69 motherboard.

Default PLL voltage for this MoBo and this CPU is 1.80V, rated intel max is 1.89V, I read in some places that sometimes you have to lower it down to help stability (but was more due to cold bug) so I don't think it's that high and really don't know how to adjust it, some guys stated in some posts I've read to lower to 1.7V and finding a "sweet spot", in my case it has always been at that range of 1.8~1.85V
 

rtwjunkie

PC Gaming Enthusiast
Supporter
Joined
Jul 25, 2008
Messages
13,909 (2.43/day)
Location
Louisiana -Laissez les bons temps rouler!
System Name Bayou Phantom
Processor Core i7-8700k 4.4Ghz @ 1.18v
Motherboard ASRock Z390 Phantom Gaming 6
Cooling All air: 2x140mm Fractal exhaust; 3x 140mm Cougar Intake; Enermax T40F Black CPU cooler
Memory 2x 16GB Mushkin Redline DDR-4 3200
Video Card(s) EVGA RTX 2080 Ti Xc
Storage 1x 500 MX500 SSD; 2x 6TB WD Black; 1x 4TB WD Black; 1x400GB VelRptr; 1x 4TB WD Blue storage (eSATA)
Display(s) HP 27q 27" IPS @ 2560 x 1440
Case Fractal Design Define R4 Black w/Titanium front -windowed
Audio Device(s) Soundblaster Z
Power Supply Seasonic X-850
Mouse Coolermaster Sentinel III (large palm grip!)
Keyboard Logitech G610 Orion mechanical (Cherry Brown switches)
Software Windows 10 Pro 64-bit (Start10 & Fences 3.0 installed)
You're correct. I had to go check one of my bookmarks at Overclock.net for Sandies. Forget my alarmism.
 
Joined
Feb 7, 2008
Messages
682 (0.12/day)
Location
Barcelona, Catalonia, Spain
System Name The Phoenix (rev. 3.0)
Processor Intel Core i9 9900K @ 4.9GHz (1.18V)
Motherboard ASUS TUF Z390 PRO-GAMING
Cooling Custom Full Loop w/EKWB & Swiftech components
Memory 32GB Corsair Vengeance RGB Pro 3200MHz (C15)
Video Card(s) MSI GTX 1080 SeaHawk X EK @ 2.15GHz/5.5GHz
Storage Samsung 970 EVO+ (2x500GB) + Toshiba X300 (4TB)
Display(s) LG 29UM65-P (2560x1080 @ 75 Hz)
Case Thermaltake Core V51
Audio Device(s) Razer Kraken 7.1 & Scarlett 2i4 w/M-AUDIO BX5-D2
Power Supply Corsair RM750 (ver. 2019)
Mouse Logitech G700s
Keyboard Razer Blackwidow Chroma V2
Software MacOS 10.13.6 "High Sierra" & Windows 10 Pro x64
You're correct. I had to go check one of my bookmarks at Overclock.net. Forget my alarmism.

Don't worry, you alarmed me a bit though hahahaha. Thing is I really don't know what to touch since 0x124 BSOD is quite tricky, usually refers to VCore but also VTT/PLL are in the game, dunno if VccSA can be maxed out more (I read in some parts that also till 1.1V was safe, IDK) or decreasing RAM performance will help in those failing tests. I need some guiding light before I lose patience as I did yesterday on my own. lol
 
Joined
Feb 21, 2008
Messages
6,862 (1.17/day)
Location
S.E. Virginia
System Name Barb's Domain
Processor i9 10850k 5.1GHz all cores
Motherboard MSI MPG Z490 GAMING EDGE WIFI
Cooling Deep Cool Assassin III
Memory 2*16gig Corsair LPX DDR4 3200
Video Card(s) RTX 4080 FE
Storage 500gb Samsung 980 Pro M2 SSD, 500GB WD Blue SATA SSD, 2TB Seagate Hybrid SSHD
Display(s) Dell - S3222DGM 32" 2k Curved/ASUS VP28UQG 28" 4K (ran at 2k), Sanyo 75" 4k TV
Case SilverStone Fortress FT04
Audio Device(s) Bose Companion II speakers, Corsair - HS70 PRO headphones
Power Supply Corsair RM850x (2021)
Mouse Logitech G502
Keyboard Logitech Orion Spectrum G910
VR HMD Oculus Quest 2
Software Windows 10 Pro 64 bit
Benchmark Scores https://www.3dmark.com/spy/34962882
Give it more VCore. It's not a Ivy-Bridge or Haswell CPU. You won't hurt it going up as high as 1.38 volts. I ran a 2600k at 4.5GHz/1.36 volts for almost 2 years, that same 2600k is now running at 4.8GHz for @T-Bob From my experience, it's at 4.2GHz that SB cpu start to require significantly more voltage per MHz. For my 2600k, I had to go from 1.29-1.3 volts to 1.33 volts to go from 4.2 to 4.3 GHz. 4.5GHz needed at least 1.352 volts (1.36 volts in BIOs) to be 100% stable

 
Last edited:

peche

Thermaltake fanboy
Joined
Nov 7, 2014
Messages
6,709 (1.96/day)
Location
San Jose, Costa Rica
System Name Athenna
Processor intel i7 3770 *Dellided*
Motherboard GIGABYTE GA-Z68X-UD3H-B3 Rev. 1.1
Cooling Thermaltake Water 3.0 Pro + Tt Riing12 x2 / Tt ThunderBlade / Gelid Slim 120UV fans
Memory 16GB DRR3 Kingoston with Custom Tt spreaders + HyperX Fan
Video Card(s) GeForce GTX 980 4GB Nvidia Sample
Storage Crucial M4 SSD 64GB's / Seagate Barracuda 2TB / Seagate Barracuda 320GB's
Display(s) 22" LG FLATRON 1920 x 1280p
Case Thermaltake Commander G42 Window
Audio Device(s) On-board Dolby 5.1+ Kingston HyperX Cloud 1
Power Supply Themaltake TR2 700W 80plus bronce & APC Pro backup 1000Va
Mouse Tt eSports Level 10M Rev 1.0 Diamond Black & Tt Conkor "L" mouse pad
Keyboard Tt eSports KNUCKER
Software windows 10x64Pro
Benchmark Scores well I've fried a 775' P4 12 years ago, that counts?
Joined
Aug 10, 2007
Messages
2,139 (0.35/day)
Location
Austin TX
Processor i9 11900k
Motherboard Maximus XII Apex
Cooling Custom Liquid W/ 360x60 Radiator
Memory 32Gb Team XTREEM ARGB 3600 b-die
Video Card(s) Waterblocked MSI RTX 4070
Storage Intel 900p 480Gb + 4tb Intel 670p
Display(s) LG C2 evo 42"
Case Geometric Future Model 8
Audio Device(s) HD58X + Sennheiser GSX 1000
Power Supply Corsair RM 750x
Mouse Steelseries Aerox 5 wired
Keyboard Akko Mod 007b HE
VR HMD Samsung Odyssey+
Software Windows 11
set the voltage to 1.35 or around there and drop your PLL to 1.5 - 1.65 until its stable (yes i said move it down). also make sure your current capability is around 130% to 140% and your load line calibration is enough to correct any vdroop

there is a TON of information in this thread over at overclock including a good relative idea of the voltage curve for sandybridge based processors, it helped me get 5Ghz out of my chip

http://www.overclock.net/t/968053/o...voltages-temps-bios-templates-inc-spreadsheet

edit: heres my DD overclock
 
Last edited:
Joined
Feb 7, 2008
Messages
682 (0.12/day)
Location
Barcelona, Catalonia, Spain
System Name The Phoenix (rev. 3.0)
Processor Intel Core i9 9900K @ 4.9GHz (1.18V)
Motherboard ASUS TUF Z390 PRO-GAMING
Cooling Custom Full Loop w/EKWB & Swiftech components
Memory 32GB Corsair Vengeance RGB Pro 3200MHz (C15)
Video Card(s) MSI GTX 1080 SeaHawk X EK @ 2.15GHz/5.5GHz
Storage Samsung 970 EVO+ (2x500GB) + Toshiba X300 (4TB)
Display(s) LG 29UM65-P (2560x1080 @ 75 Hz)
Case Thermaltake Core V51
Audio Device(s) Razer Kraken 7.1 & Scarlett 2i4 w/M-AUDIO BX5-D2
Power Supply Corsair RM750 (ver. 2019)
Mouse Logitech G700s
Keyboard Razer Blackwidow Chroma V2
Software MacOS 10.13.6 "High Sierra" & Windows 10 Pro x64
Thank you very much Arrakis for pointing me to that address, most of the information I've read these days I think it came from there but I was kinda lost. Right now I'm testing with an 1.7V PLL and a just a raised notch on the voltage as Barbaric pointed and so far so good ... I'll post results soon!
 
Joined
Aug 10, 2007
Messages
2,139 (0.35/day)
Location
Austin TX
Processor i9 11900k
Motherboard Maximus XII Apex
Cooling Custom Liquid W/ 360x60 Radiator
Memory 32Gb Team XTREEM ARGB 3600 b-die
Video Card(s) Waterblocked MSI RTX 4070
Storage Intel 900p 480Gb + 4tb Intel 670p
Display(s) LG C2 evo 42"
Case Geometric Future Model 8
Audio Device(s) HD58X + Sennheiser GSX 1000
Power Supply Corsair RM 750x
Mouse Steelseries Aerox 5 wired
Keyboard Akko Mod 007b HE
VR HMD Samsung Odyssey+
Software Windows 11
Thank you very much Arrakis for pointing me to that address, most of the information I've read these days I think it came from there but I was kinda lost. Right now I'm testing with an 1.7V PLL and a just a raised notch on the voltage as Barbaric pointed and so far so good ... I'll post results soon!

If you need any more suggestions/assistance i'd be happy to help, that thread has a ton of info but its a dead thread and not very many people reply unless they also have a sandybridge
 
Joined
Dec 18, 2012
Messages
392 (0.10/day)
Processor Ryzen 7 5800x @ 4,85Ghz
Motherboard AORUS MASTER X570
Cooling Costume External Water Loop 1080 Rad
Memory Patriot Viper Steel DDR4-3600 16GB @3800 mhz cl16
Video Card(s) RTX 3090 Water
Storage Raid0 4 x Sasmsung 850 EVo, 980 1TB M.2
Display(s) ASUS Swift
Case Open test bench
Power Supply Be quiet! 850 P10
Mouse G703
Keyboard Old USB Dell Keyboard x2
VR HMD Rift S
Software Windows 11
[QUOTE="BarbaricSoul, post: 3239100, member: 49368"

[/QUOTE]

 
Joined
Jan 27, 2008
Messages
468 (0.08/day)
Location
The Lowcountry
System Name Daily Driver / Mobile Gamer
Processor R7-2700x / R7-3700x
Motherboard ASRock Taichi x470 / ASRock x370 Gaming ITX
Cooling EK monoblock - dual 360 rads / NH-U9S
Memory G.Skill 16GB 3466c14 / Crucial 32GB 3733c16
Video Card(s) TITAN / GTX 1070ti
Storage WD BLACK 500GB SSD / 1TB M.2, 1TB 850 EVO
Display(s) LG 27EA83R / TeamViewer
Case Dimastech Easy V3 / DA-2
Audio Device(s) HT E-Claro -> Yamaha Receiver - Polk CS1, 2x Polk OWM3 or DT-990 Pro
Power Supply SeaSonic X-850 / SSR-650SGX
Mouse Mionix NAOS 7000
Keyboard Drevo GRAMR tkl
Software Linux & Win10 Pro
Give it more VCore. It's not a Ivy-Bridge or Haswell CPU. You won't hurt it going up as high as 1.38 volts. I ran a 2600k at 4.5GHz/1.36 volts for almost 2 years, that same 2600k is now running at 4.8GHz for @T-Bob From my experience, it's at 4.2GHz that SB cpu start to require significantly more voltage per MHz. For my 2600k, I had to go from 1.29-1.3 volts to 1.33 volts to go from 4.2 to 4.3 GHz. 4.5GHz needed at least 1.352 volts (1.36 volts in BIOs) to be 100% stable

I agree. After 4.2Ghz the SB cores require more voltage and put out a lot more heat. though if you can cool it the chip can take it. Here's a screenshot of mine 2600k currently.
2600k _4.7GHz.jpg
 
Joined
Jul 18, 2007
Messages
2,693 (0.44/day)
System Name panda
Processor 6700k
Motherboard sabertooth s
Cooling raystorm block<black ice stealth 240 rad<ek dcc 18w 140 xres
Memory 32gb ripjaw v
Video Card(s) 290x gamer<ntzx g10<antec 920
Storage 950 pro 250gb boot 850 evo pr0n
Display(s) QX2710LED@110hz lg 27ud68p
Case 540 Air
Audio Device(s) nope
Power Supply 750w superflower
Mouse g502
Keyboard shine 3 with grey, black and red caps
Software win 10
Benchmark Scores http://hwbot.org/user/marsey99/
the scaling goes to cock at different speeds on each chip. good ones will get past 4.5ghz before it gets insane others will start at 4ghz :(

i have that mobo dude and i found some bios versions are just pants.

i think f3 or 4 was the last good one and after that it was less performance and more about compatibility.

arrakis is spot on about dropping the pll too. finding the right pll is what cleared my really random idle bsod.

been a while since i played with my 25k but my 26k loved it at 1.625.
 
Joined
Feb 7, 2008
Messages
682 (0.12/day)
Location
Barcelona, Catalonia, Spain
System Name The Phoenix (rev. 3.0)
Processor Intel Core i9 9900K @ 4.9GHz (1.18V)
Motherboard ASUS TUF Z390 PRO-GAMING
Cooling Custom Full Loop w/EKWB & Swiftech components
Memory 32GB Corsair Vengeance RGB Pro 3200MHz (C15)
Video Card(s) MSI GTX 1080 SeaHawk X EK @ 2.15GHz/5.5GHz
Storage Samsung 970 EVO+ (2x500GB) + Toshiba X300 (4TB)
Display(s) LG 29UM65-P (2560x1080 @ 75 Hz)
Case Thermaltake Core V51
Audio Device(s) Razer Kraken 7.1 & Scarlett 2i4 w/M-AUDIO BX5-D2
Power Supply Corsair RM750 (ver. 2019)
Mouse Logitech G700s
Keyboard Razer Blackwidow Chroma V2
Software MacOS 10.13.6 "High Sierra" & Windows 10 Pro x64
Hello guys!

Well, I've been testing quite long and arrived to some first conclusions:

1. I won't use LLC at level 4 anymore, it was undervolting the minimum, but it's my guess that undervolting was creating the random BSODs, tried to adjust with all PLL or VTT levels and it still failed, so my only guess it was VCore that had to be raised up as you all said to maintain those 4.3GHz.

2. In all the tests trying not go up 1.296V on load, lower PLL/VTT voltage helped more the stability with the LargeFFTs test lasting longer, improved VDroop stability as well. Amazing but true.

3. Right now I prefer the LLC level 5 which idles at 1.284V and loads at 1.308V, kind of reverse VDroop that I heard it's not that dangerous.

With all that said i'm now at VTT: 1.114~1.128V // PLL: 1.705V // VccSA: 0.975V // CPU VCore: 1.284V (idle) & 1.308V (load) ... the good news is P95 Large FFTs, P95 Blend (80% memory) passed flawlessly w/o a problem the 20 mins test. So my question arises again, should I leave the PLL voltage as that or return to default 1.8's while trying maybe to get more juice? Some thoughts on VTT? Always open to suggestions
I'm gonna extend the tests and tell you soon :toast:

T-Bob, nice clock!!! is it 24/7?

marsey99, I wish I could go down to those BIOS versions but in order to maintain the compatibility between Mac and Windows, I have to use the F6 one.

Thanks a lot guys for all your help, I do really appreciate it =)

Edit: P95 Blend Test lasted 1 hour w/o problems. Testing the fatidic "1344" and "1792" FFT by itself popped 0x124 BSODs that I was able to fix reducing PLL till 1.625V, then 10 minutes run of both didn't provoke problems .... aiming for 4.4GHz now with 1.296V idle - 1.32V load, wish me luck! :D
 
Last edited:
Joined
Jan 27, 2008
Messages
468 (0.08/day)
Location
The Lowcountry
System Name Daily Driver / Mobile Gamer
Processor R7-2700x / R7-3700x
Motherboard ASRock Taichi x470 / ASRock x370 Gaming ITX
Cooling EK monoblock - dual 360 rads / NH-U9S
Memory G.Skill 16GB 3466c14 / Crucial 32GB 3733c16
Video Card(s) TITAN / GTX 1070ti
Storage WD BLACK 500GB SSD / 1TB M.2, 1TB 850 EVO
Display(s) LG 27EA83R / TeamViewer
Case Dimastech Easy V3 / DA-2
Audio Device(s) HT E-Claro -> Yamaha Receiver - Polk CS1, 2x Polk OWM3 or DT-990 Pro
Power Supply SeaSonic X-850 / SSR-650SGX
Mouse Mionix NAOS 7000
Keyboard Drevo GRAMR tkl
Software Linux & Win10 Pro
Hello guys!

Well, I've been testing quite long and arrived to some first conclusions:

1. I won't use LLC at level 4 anymore, it was undervolting the minimum, but it's my guess that undervolting was creating the random BSODs, tried to adjust with all PLL or VTT levels and it still failed, so my only guess it was VCore that had to be raised up as you all said to maintain those 4.3GHz.

2. In all the tests trying not go up 1.296V on load, lower PLL/VTT voltage helped more the stability with the LargeFFTs test lasting longer, improved VDroop stability as well. Amazing but true.

3. Right now I prefer the LLC level 5 which idles at 1.284V and loads at 1.308V, kind of reverse VDroop that I heard it's not that dangerous.

With all that said i'm now at VTT: 1.114~1.128V // PLL: 1.705V // VccSA: 0.975V // CPU VCore: 1.284V (idle) & 1.308V (load) ... the good news is P95 Large FFTs, P95 Blend (80% memory) passed flawlessly w/o a problem the 20 mins test. So my question arises again, should I leave the PLL voltage as that or return to default 1.8's while trying maybe to get more juice? Some thoughts on VTT? Always open to suggestions
I'm gonna extend the tests and tell you soon :toast:

T-Bob, nice clock!!! is it 24/7?

marsey99, I wish I could go down to those BIOS versions but in order to maintain the compatibility between Mac and Windows, I have to use the F6 one.

Thanks a lot guys for all your help, I do really appreciate it =)

Edit: P95 Blend Test lasted 1 hour w/o problems. Testing the fatidic "1344" and "1792" FFT by itself popped 0x124 BSODs that I was able to fix reducing PLL till 1.625V, then 10 minutes run of both didn't provoke problems .... aiming for 4.4GHz now with 1.296V idle - 1.32V load, wish me luck! :D
Yes it is 24/7 stable. It runs WCG and Folds constantly. If you need anymore help just tag me in this post. Though IMO it appears that you've got it figured out:peace:
 
Joined
Feb 7, 2008
Messages
682 (0.12/day)
Location
Barcelona, Catalonia, Spain
System Name The Phoenix (rev. 3.0)
Processor Intel Core i9 9900K @ 4.9GHz (1.18V)
Motherboard ASUS TUF Z390 PRO-GAMING
Cooling Custom Full Loop w/EKWB & Swiftech components
Memory 32GB Corsair Vengeance RGB Pro 3200MHz (C15)
Video Card(s) MSI GTX 1080 SeaHawk X EK @ 2.15GHz/5.5GHz
Storage Samsung 970 EVO+ (2x500GB) + Toshiba X300 (4TB)
Display(s) LG 29UM65-P (2560x1080 @ 75 Hz)
Case Thermaltake Core V51
Audio Device(s) Razer Kraken 7.1 & Scarlett 2i4 w/M-AUDIO BX5-D2
Power Supply Corsair RM750 (ver. 2019)
Mouse Logitech G700s
Keyboard Razer Blackwidow Chroma V2
Software MacOS 10.13.6 "High Sierra" & Windows 10 Pro x64
Hello again guys,

After some days of tweaking I think I finally reached a "stable" overclock and i'm quoting that cause it hasn't been tested in Prime95 or OCCT anymore, random BSODs are really random and trying to find a sweet spot for all of them was CRAZY, instead of that, I used Linpack with AVX instructions to test calculation errors/real BSODs and see the GFlops performance to find that sweet spot which I managed to find for 4.4GHz. AIDA64 Stability test then was fired on.

So, here are my "final" settings for the 4.4GHz overclock:

CPU VCore: 1.308V idle - 1.320V~1.332V load (min peak: 1.296V - max peak: 1.344V) // LLC Level: 5
PLL: 1.725V // VTT: 1.080V idle - 1.092V load // VccSA: 0.975V // DRAM Performance: Extreme // C-States: Disabled // Turbo: Disabled // Internal PLL Overclock: Disabled

And the tests passed:

Linpack w/1024MB - 50 passes // Linpack w/2048MB - 40 passes // Linpack w/4096MB - 30 passes // Linpack w/8092MB - 20 passes
AIDA64 (CPU - 1h // FPU - 1h // Cache - 1h // RAM - 1h // CPU+FPU+Cache+Ram - 14h)
3DMark11 - 10 passes // Gaming for 1h

Now i'm crunching (WCG) for 3 hours and doing normal stuff (browsing / watching videos / chatting) with the PC with no issues, no hangs and no random BSODs.

Here I leave one screenshot of yesterday tests on a 10pass 1024MB



I tried to aim at 4.5GHz but I know I'd have to raise the voltage tilll safe max and I don't want to do that yet. What do you think anyway? Decent results?
Thanks a lot again for your help guys, happy OCing to everybody :toast:
 
Joined
Jul 18, 2007
Messages
2,693 (0.44/day)
System Name panda
Processor 6700k
Motherboard sabertooth s
Cooling raystorm block<black ice stealth 240 rad<ek dcc 18w 140 xres
Memory 32gb ripjaw v
Video Card(s) 290x gamer<ntzx g10<antec 920
Storage 950 pro 250gb boot 850 evo pr0n
Display(s) QX2710LED@110hz lg 27ud68p
Case 540 Air
Audio Device(s) nope
Power Supply 750w superflower
Mouse g502
Keyboard shine 3 with grey, black and red caps
Software win 10
Benchmark Scores http://hwbot.org/user/marsey99/
if you drop the multi back and find what vcore you need for each 100mhz you can plot a pretty accurate curve to start testing the next 100mhz from ;)
 
Joined
Feb 7, 2008
Messages
682 (0.12/day)
Location
Barcelona, Catalonia, Spain
System Name The Phoenix (rev. 3.0)
Processor Intel Core i9 9900K @ 4.9GHz (1.18V)
Motherboard ASUS TUF Z390 PRO-GAMING
Cooling Custom Full Loop w/EKWB & Swiftech components
Memory 32GB Corsair Vengeance RGB Pro 3200MHz (C15)
Video Card(s) MSI GTX 1080 SeaHawk X EK @ 2.15GHz/5.5GHz
Storage Samsung 970 EVO+ (2x500GB) + Toshiba X300 (4TB)
Display(s) LG 29UM65-P (2560x1080 @ 75 Hz)
Case Thermaltake Core V51
Audio Device(s) Razer Kraken 7.1 & Scarlett 2i4 w/M-AUDIO BX5-D2
Power Supply Corsair RM750 (ver. 2019)
Mouse Logitech G700s
Keyboard Razer Blackwidow Chroma V2
Software MacOS 10.13.6 "High Sierra" & Windows 10 Pro x64
if you drop the multi back and find what vcore you need for each 100mhz you can plot a pretty accurate curve to start testing the next 100mhz from ;)

Yup, pretty sure it's that why i'm not pushing till 4.5GHz, i know 1.344V on load is not enough (tested with IBT and freezed at the 2048MB pass) and next step is max safe or even more so ... really don't want to push it to that limit yet, this CPU has to last more years yet :p

Btw, needed voltages were: 4.1GHz - 1.248V load // 4.2GHz - 1.282V load // 4.3GHz - 1.308V load // 4.4GHz - 1.320~1.332V load

And really I don't want to open a debate here, but the system is running perfect now with WCG (crunching on 4 cores) and F@H at the GPU while browsing and watching videos with VLC for some hours, so ... does the system really needs to be P95 stable for other programs rather tan P95 itself? I know if I have errors at calcs I'll have to eat my words (from the previous post you can see I was being cautious though) ... but the question remains cause P95 was not creating "calc" errors .. directly BSODing and this load (for all night and day) didn't created one, any guess?
 
Last edited:
Joined
Jul 18, 2007
Messages
2,693 (0.44/day)
System Name panda
Processor 6700k
Motherboard sabertooth s
Cooling raystorm block<black ice stealth 240 rad<ek dcc 18w 140 xres
Memory 32gb ripjaw v
Video Card(s) 290x gamer<ntzx g10<antec 920
Storage 950 pro 250gb boot 850 evo pr0n
Display(s) QX2710LED@110hz lg 27ud68p
Case 540 Air
Audio Device(s) nope
Power Supply 750w superflower
Mouse g502
Keyboard shine 3 with grey, black and red caps
Software win 10
Benchmark Scores http://hwbot.org/user/marsey99/
for x45 i would guess around 1.36/1.38 but you never know. could be 1.4 if the chip is hungry :s

edit

try other software to see if you can crash it with more than just p95 dude.
 
Joined
Feb 7, 2008
Messages
682 (0.12/day)
Location
Barcelona, Catalonia, Spain
System Name The Phoenix (rev. 3.0)
Processor Intel Core i9 9900K @ 4.9GHz (1.18V)
Motherboard ASUS TUF Z390 PRO-GAMING
Cooling Custom Full Loop w/EKWB & Swiftech components
Memory 32GB Corsair Vengeance RGB Pro 3200MHz (C15)
Video Card(s) MSI GTX 1080 SeaHawk X EK @ 2.15GHz/5.5GHz
Storage Samsung 970 EVO+ (2x500GB) + Toshiba X300 (4TB)
Display(s) LG 29UM65-P (2560x1080 @ 75 Hz)
Case Thermaltake Core V51
Audio Device(s) Razer Kraken 7.1 & Scarlett 2i4 w/M-AUDIO BX5-D2
Power Supply Corsair RM750 (ver. 2019)
Mouse Logitech G700s
Keyboard Razer Blackwidow Chroma V2
Software MacOS 10.13.6 "High Sierra" & Windows 10 Pro x64
for x45 i would guess around 1.36/1.38 but you never know. could be 1.4 if the chip is hungry :s

Being currently at 4.4GHz with this safe voltage I don't see the point to go that high to reach 4.5GHz IMHO, so i'm pretty sure it will stay like this till I go insane and decide to "burn" it ... or this setup starts to fail despite all my tests lol
 
Top