System unstable with high NB clock

hat · Apr 5, 2012, 11:29 PM

I've discovered that my memory performs quite a bit better when I run my NB at 2500MHz compared to 2000MHz. In the AIDA64 memory benchmark, there's an improvement across the board in all areas, and not just in my memory, in my L1, L2 and L3 caches too. The problem is the system goes unstable when the NB is set to 2500MHz. What should I change? I can change CPU voltage, memory voltage, NB voltage and CPU NB voltage. For now, I've dropped the HT link speed down to 2000MHz while keeping the NB clock at 2500MHz to see if maybe the HT link went unstable. Specs to the left.

fullinfusion · Apr 6, 2012, 01:10 AM

just turn up the cpu/nb volts a bit.

erocker · Apr 6, 2012, 01:12 AM

CPU/NB voltage is the "northbridge" voltage as it is listed in CPU-Z. It's really the memory controller. Keep HTT at 2000mhz, there's no reason to go higher and it makes no difference.

hat · Apr 6, 2012, 01:34 AM

Here's some before and after images. I'm not raising the HT link, just the NB frequency. I take it the voltage I need is CPU NB VID control?

fullinfusion · Apr 6, 2012, 01:20 PM

You betcha. Do you know what the voltage is reading in the bios?

hat · Apr 6, 2012, 08:20 PM

Stock is 1.15v. That failed within 10 minutes. I tried 1.175v, crapped out around 45 minutes. Now at 1.2v...

fullinfusion · Apr 6, 2012, 08:22 PM

Quote:

Originally Posted by hat

Stock is 1.15v. That failed within 10 minutes. I tried 1.175v, crapped out around 45 minutes. Now at 1.2v...

your going to probably doing to need 1.275ish Im thinking. 1.30v is still ok for 3000MHz

hat · Apr 7, 2012, 03:56 AM

Tested one hour stable at 1.2v, going to run it through the 8 hour test later tonight while I sleep.

Goodman · Apr 7, 2012, 04:18 AM

Quote:

Originally Posted by hat

Stock is 1.15v. That failed within 10 minutes. I tried 1.175v, crapped out around 45 minutes. Now at 1.2v...

You are not raising the right one? , you need to raise the CPU NB Vid control & not the NB voltage
The CPU NB VID Control should be at 1.2v stock & for 2500+ NB stable you will need about 1.350-1.375v
Mine is running at 1.4250v for 2660 NB

Also as Erocker said keep the HTT at +- 2000 , i keep mine at auto & stock voltage

erocker · Apr 7, 2012, 04:53 AM

Quote:

Originally Posted by hat

Here's some before and after images. I'm not raising the HT link, just the NB frequency. I take it the voltage I need is CPU NB VID control?

^ Yes, that is the voltage he is adjusting.

hat · Apr 7, 2012, 06:06 AM

Mine is 1.15v stock and passed occt for 1 hour stable at 1.2v. Maybe you need a higher voltage because you have a quad? I'm not sure if it's totally stable yet, will do a longer test overnight.

Inceptor · Apr 7, 2012, 06:15 AM

Quote:

Originally Posted by Goodman

You are not raising the right one? , you need to raise the CPU NB Vid control & not the NB voltage
The CPU NB VID Control should be at 1.2v stock & for 2500+ NB stable you will need about 1.350-1.375v
Mine is running at 1.4250v for 2660 NB

Your CPU NB VID voltage is too high, or you have a poor performing chip.

To OP, no more than 1.25v should be enough for 2500 mhz NB to be stable; somewhere between 1.21 and 1.25 should be enough, depending on how many sticks of RAM you're using and how much (if at all) you're overclocking the RAM.

hat · Apr 7, 2012, 06:24 PM

http://valid.canardpc.com/show_oc.php?id=2323761

tested stable for 8.5 hours

Apr 5, 2012, 11:29 PM	#1
hat Maximum Overclocker Join Date: Nov 2006 Location: Ohio Posts: 12,236 (5.15/day) Thanks: 2,054 Thanked 2,039 Times in 1,549 Posts System Specs	System unstable with high NB clock I've discovered that my memory performs quite a bit better when I run my NB at 2500MHz compared to 2000MHz. In the AIDA64 memory benchmark, there's an improvement across the board in all areas, and not just in my memory, in my L1, L2 and L3 caches too. The problem is the system goes unstable when the NB is set to 2500MHz. What should I change? I can change CPU voltage, memory voltage, NB voltage and CPU NB voltage. For now, I've dropped the HT link speed down to 2000MHz while keeping the NB clock at 2500MHz to see if maybe the HT link went unstable. Specs to the left. __________________ My Heatware “Inb4 smartphone LN2 overclocking.” -radrok

System Name:	Starlifter // Dragonfly
Processor:	(lapped) i7 920 4GHz 1.3v // 1090T 3.6GHz 1.3v
Motherboard:	Asus Rampage III // Gigabyte GA-770T-USB3
Cooling:	(lapped) Corsair H70 // (lapped) TT Big Typhoon
Memory:	3x2GB DDR3 1600 10-10-10-30-128-1T 1.5v // 2x2GB DDR3 1333 9-9-9-24-1T 1.5v
Video Card:	HIS Radeon 5870 // BFG Maxcore 55 GTX260
Hard Disk:	Plextor M5S 128GB + 512GB OCZ Agility 4 + 2TB WD20EARS // WDC Black 500GB
Optical Drive:	SATA DVD-RW // IDE CD-RW
CRT/LCD Model:	Dell/Alienware AW2310 + 19" HDTV // 19" HDTV
Case:	Antec SOHO 1030B // some really old white case... but it's decent
Sound Card:	Creative X-Fi Fatality Professional // onboard (disabled)
PSU:	Antec NeoHe 550W // Corsair CX600w
Software:	Windows 7 Home Premium x64 // Windows 7 Home Premium x64
Benchmarks:	zunn zunnzunn zunn zunn

Apr 6, 2012, 01:10 AM	#2
fullinfusion 1.21 Gigawatts Join Date: Jan 2008 Location: CANADA Posts: 5,448 (2.78/day) Thanks: 2,688 Thanked 1,294 Times in 1,092 Posts System Specs	just turn up the cpu/nb volts a bit. __________________ CPU-Z validation sig pics temporarily blocked

System Name:	Wattage sucking Bitch II
Processor:	i7 2700K @4.9GHz 24/7 @ 1.36v
Motherboard:	ROG Maximus IV Extreme-Z68
Cooling:	EK Supreme HF EN Full Nickel Plated \| twin Noctua NF-F12's \| Black Ice GT Stealth 240
Memory:	Corsair Dominator platinum 2133 Tweaked 2x4Gb sticks
Video Card:	2X MSI R7970 OC cross-fire reference edition @ 1250/1550MHz stock 1.175v
Hard Disk:	OCZ Vertex 4 128Gb
Optical Drive:	Asus DRW-24B1ST *quietest drive ever!
CRT/LCD Model:	Gateway 24" led/Samsung 56 Led DLP
Case:	Corsair Obsidion 650D
Sound Card:	Asus Xonar Essance STX
PSU:	Corsair HX850 Professional Series
Software:	Windows7 Home Premium 64
Benchmarks:	Better then most!

Processor:	Intel i7 3770K @ 4.6ghz 1.256v
Motherboard:	Asus Maximus V Formula
Cooling:	Water
Memory:	2x4gb Patriot Viper 2133mhz 10-11-10-25 2T 1.55v
Video Card:	Sapphire HD 7970 1125/1575 1.14v
Hard Disk:	Crucial M4 128Gb / Corsair Force 3 120Gb / Samsung 240Gb / 2Tb Seagate
Optical Drive:	None
CRT/LCD Model:	Acheiva Shimian 27" IPS 2560x1440
Case:	Corsair 500R White
Sound Card:	Onboard
PSU:	NZXT Hale90 1Kw
Software:	Windows 8 x64

Apr 6, 2012, 01:12 AM	#3
erocker Senior Moderator Join Date: Jul 2006 Location: Milwaukee, WI. Posts: 31,922 (12.77/day) Thanks: 2,786 Thanked 12,296 Times in 7,821 Posts System Specs	CPU/NB voltage is the "northbridge" voltage as it is listed in CPU-Z. It's really the memory controller. Keep HTT at 2000mhz, there's no reason to go higher and it makes no difference.

Apr 6, 2012, 01:34 AM	#4
hat Maximum Overclocker Join Date: Nov 2006 Location: Ohio Posts: 12,236 (5.15/day) Thanks: 2,054 Thanked 2,039 Times in 1,549 Posts System Specs	Here's some before and after images. I'm not raising the HT link, just the NB frequency. I take it the voltage I need is CPU NB VID control? __________________ My Heatware “Inb4 smartphone LN2 overclocking.” -radrok

Apr 6, 2012, 01:20 PM	#5
fullinfusion 1.21 Gigawatts Join Date: Jan 2008 Location: CANADA Posts: 5,448 (2.78/day) Thanks: 2,688 Thanked 1,294 Times in 1,092 Posts System Specs	You betcha. Do you know what the voltage is reading in the bios? __________________ CPU-Z validation sig pics temporarily blocked

Apr 6, 2012, 08:20 PM	#6
hat Maximum Overclocker Join Date: Nov 2006 Location: Ohio Posts: 12,236 (5.15/day) Thanks: 2,054 Thanked 2,039 Times in 1,549 Posts System Specs	Stock is 1.15v. That failed within 10 minutes. I tried 1.175v, crapped out around 45 minutes. Now at 1.2v... __________________ My Heatware “Inb4 smartphone LN2 overclocking.” -radrok

Apr 7, 2012, 03:56 AM	#8
hat Maximum Overclocker Join Date: Nov 2006 Location: Ohio Posts: 12,236 (5.15/day) Thanks: 2,054 Thanked 2,039 Times in 1,549 Posts System Specs	Tested one hour stable at 1.2v, going to run it through the 8 hour test later tonight while I sleep. __________________ My Heatware “Inb4 smartphone LN2 overclocking.” -radrok

System Name:	Main PC
Processor:	PII 925 @3.724GHz (266x14) 1.525v NB 2660 1.425v
Motherboard:	Gigabyte AM3 GA-890XA-UD3 (790x+SB850)
Cooling:	Scythe Mugen 2 rev.B
Memory:	Hyperx 8GB (2x4) 1600@1418 8-7-7-20-27-1t
Video Card:	Sapphire 6850 Stock (Max Overclock 1030/1200)
Hard Disk:	1x1TB WD Green / 1x1TB Seagate
Optical Drive:	LG 20x DVD+RW Sata
CRT/LCD Model:	LCD Samsung 24" 16:9
Case:	Cooler Master HAF 912
Sound Card:	On-Board HD
PSU:	CM 750w GX \|3.3v@25a\|5v@25a\|12v@60a
Software:	Windows 7 Ultimate 64bit
Benchmarks:	later...

Apr 7, 2012, 06:06 AM	#11
hat Maximum Overclocker Join Date: Nov 2006 Location: Ohio Posts: 12,236 (5.15/day) Thanks: 2,054 Thanked 2,039 Times in 1,549 Posts System Specs	Mine is 1.15v stock and passed occt for 1 hour stable at 1.2v. Maybe you need a higher voltage because you have a quad? I'm not sure if it's totally stable yet, will do a longer test overnight. __________________ My Heatware “Inb4 smartphone LN2 overclocking.” -radrok

System Name:	Multipurpose desktop
Processor:	AMD Phenom II x6 1605T @ 3.5Ghz , NB @ 2.5
Motherboard:	Gigabyte 990FXA-UD3 (rev 1.0)
Cooling:	Prolimatech Megahalems Rev. C, 2x120mm CM Blademaster
Memory:	Corsair Vengeance LP (4x4GB) @1666Mhz 9-9-9-20-24 1T
Video Card:	XFX HD6850 ZDFC -- @ 875/1100
Hard Disk:	2x WD Caviar Black 500GB Sata III in RAID 0
Optical Drive:	Plextor PX-L890SA DVD writer
CRT/LCD Model:	Acer S211HL 21.5" 1920x1080
Case:	Cooler Master Centurion 534+, 3x 120mm CM Sickle Flow
PSU:	Seasonic X650 Gold
Software:	Windows 7 x64 Home Premium SP1

Apr 7, 2012, 06:24 PM	#13
hat Maximum Overclocker Join Date: Nov 2006 Location: Ohio Posts: 12,236 (5.15/day) Thanks: 2,054 Thanked 2,039 Times in 1,549 Posts System Specs	http://valid.canardpc.com/show_oc.php?id=2323761 tested stable for 8.5 hours __________________ My Heatware “Inb4 smartphone LN2 overclocking.” -radrok

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