CPU PLL Voltage - what is it and how can it help overclocking?

Sasqui · Nov 7, 2009, 04:40 PM

This is on an ASUS Maximus Extreme X38 w/ an E8600.

I can't seem to break the Prime95 (two workers) long term torture over 4.4 Ghz, I'm at 1.296v according to CPUz. Windows itself is stable at 4.6 Ghz at that voltage. Temps at 66c max (load), 44c idle. OCZ Vendetta DHP cooler.

Would raising the CPU PLL voltage help? What should I set it to?

I get almost identical results using 10x, 9.5x, 9.0x & 8.5x multipliers. The board seems to have a 530 or so FSB cap. So far, I haven't messed with the NB voltage.

JrRacinFan · Nov 7, 2009, 05:02 PM

Try 1.3v. What is your CPU GTL ratio's set at?

Sasqui · Nov 7, 2009, 05:14 PM

Quote:

Originally Posted by JrRacinFan

Try 1.3v. What is your CPU GTL ratio's set at?

Running a test @1.5v PLL now 4.4Ghz, CPU 1.304v at the end of the first round 1024k of Prime... usually fails on the second.

Ummmm... what's a GTL ratio?

Sasqui · Nov 7, 2009, 05:16 PM

Crap, just failed a thread. Thankfully, it fails gracefully...

JrRacinFan · Nov 7, 2009, 05:19 PM

List all your bios options for me please. Sounds like you need a little bump in vcore.

Sasqui · Nov 7, 2009, 05:28 PM

Quote:

Originally Posted by JrRacinFan

List all your bios options for me please. Sounds like you need a little bump in vcore.

That was not the option I wanted to hear

Trying a 1.6v PLL and a bump in NB voltage... will get back with the values and options.

Sasqui · Nov 7, 2009, 05:38 PM

No luck... another fatal error on one of the workers... bumping up the CPU voltage

Fitseries3 · Nov 7, 2009, 05:40 PM

pll used to be a big deal but not any more.

you rarely need to change it at all. only at high OC's.

im talking like 5ghz+

Sasqui · Nov 7, 2009, 06:02 PM

Quote:

Originally Posted by Fitseries3

pll used to be a big deal but not any more.

you rarely need to change it at all. only at high OC's.

im talking like 5ghz+

Yikes! I'm hitting 74c now, not over the first round. 1.320v I need to get this thing under water.

I set the MB and PLL back to Auto... How good is the ASUS monitoring software? I've downloaded a bunch. Is it the "AI Suite"?

Here we go... starting on round 2 of prime... finger crossed.

FUCK... failure. Seems to always happen on Core2

Nov 7, 2009, 04:40 PM	#1
Sasqui Eligible for custom title Join Date: Dec 2005 Location: Manchester, NH Posts: 6,046 (2.22/day) Thanks: 816 Thanked 904 Times in 738 Posts System Specs	CPU PLL Voltage - what is it and how can it help overclocking? This is on an ASUS Maximus Extreme X38 w/ an E8600. I can't seem to break the Prime95 (two workers) long term torture over 4.4 Ghz, I'm at 1.296v according to CPUz. Windows itself is stable at 4.6 Ghz at that voltage. Temps at 66c max (load), 44c idle. OCZ Vendetta DHP cooler. Would raising the CPU PLL voltage help? What should I set it to? I get almost identical results using 10x, 9.5x, 9.0x & 8.5x multipliers. The board seems to have a 530 or so FSB cap. So far, I haven't messed with the NB voltage. __________________ Heatware

System Name:	"Naked Ivy"
Processor:	i7-3570k Costa (4.7 Ghz 24/7), Now de-lidded and NAKED!
Motherboard:	GA-Z77X-UD5H (rev1.1)
Cooling:	SWTech 320 Rad, Modded 655 Pump, Koolance 345
Memory:	16GB 4x4 G.Skill CAS9 2133 Sniper
Video Card:	Powercolor HD 7870 (Core at 1200, 5% bump in voltage)
Hard Disk:	WD 320 / 500KS / 500KS / 640KS / 640LS / 640LS / 640LS / 1TBFAEX
Optical Drive:	LG DVD+-R
CRT/LCD Model:	24" DELL 2405FPW
Case:	Modded HAF 932
Sound Card:	Onboard + HD HDMI
PSU:	Corsair HX750 (love it)
Software:	Win 7 Ultimate
Benchmarks:	Almost stable @ 4.9 Ghz, working on benchies

Nov 7, 2009, 05:02 PM	#2
JrRacinFan Served 5k and counting ... Join Date: Mar 2007 Location: Youngstown, OH Posts: 16,121 (7.14/day) Thanks: 4,149 Thanked 4,552 Times in 4,027 Posts System Specs	Try 1.3v. What is your CPU GTL ratio's set at? __________________ Graphics Artists United™ Request Thread Low Cache CPU Club Solaris Utility DVD 3.0 DanishDevil's Logitech Soundroom TPU Video Gallery Sciencemark Revisited

System Name:	Mine; Hers; Our HTPC; NAS Box
Processor:	i7 2600k : i3 2120 : Celeron G440 : P4 2.6Ghz Nwood
Motherboard:	Asrock Z68 Extreme4 : Asus P8P67 Pro : Asrock H61M/U3S3 : Dell
Cooling:	CM 212+ w/ scythe jyuni : Stock : Stock :Stock
Memory:	2x4GB Ripjawx 1866 cl9 : 2x2GB Corsair 1600 cl9 : 2x2GB Ridgebacks 1066 cl5 : 768MB PC3200
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Hard Disk:	2x 750GB Raid 0 + Maxtor 500GB : WD Black 1TB+Corsair Nova 2 64GB : Toshiba 750GB : Leftover ATA133
Optical Drive:	Lite-On DVD-RW : Samsung DVD-RW : None : None
CRT/LCD Model:	AOC 21" : AOC 20" : Philips 42" HDTV : Headless
Case:	Rocketfish : CM HAF 912 : Bgears Cube Style case : Dell
Sound Card:	X-Fi Xtremegamer : Onboard : Onboard : Onboard
PSU:	Tt 750W Modular : Antec 500W Earthwatts : Corsair CX430 : Dell's OEM

System Name:	"Naked Ivy"
Processor:	i7-3570k Costa (4.7 Ghz 24/7), Now de-lidded and NAKED!
Motherboard:	GA-Z77X-UD5H (rev1.1)
Cooling:	SWTech 320 Rad, Modded 655 Pump, Koolance 345
Memory:	16GB 4x4 G.Skill CAS9 2133 Sniper
Video Card:	Powercolor HD 7870 (Core at 1200, 5% bump in voltage)
Hard Disk:	WD 320 / 500KS / 500KS / 640KS / 640LS / 640LS / 640LS / 1TBFAEX
Optical Drive:	LG DVD+-R
CRT/LCD Model:	24" DELL 2405FPW
Case:	Modded HAF 932
Sound Card:	Onboard + HD HDMI
PSU:	Corsair HX750 (love it)
Software:	Win 7 Ultimate
Benchmarks:	Almost stable @ 4.9 Ghz, working on benchies

Nov 7, 2009, 05:16 PM	#4
Sasqui Eligible for custom title Join Date: Dec 2005 Location: Manchester, NH Posts: 6,046 (2.22/day) Thanks: 816 Thanked 904 Times in 738 Posts System Specs	Crap, just failed a thread. Thankfully, it fails gracefully... __________________ Heatware

Nov 7, 2009, 05:19 PM	#5
JrRacinFan Served 5k and counting ... Join Date: Mar 2007 Location: Youngstown, OH Posts: 16,121 (7.14/day) Thanks: 4,149 Thanked 4,552 Times in 4,027 Posts System Specs	List all your bios options for me please. Sounds like you need a little bump in vcore. __________________ Graphics Artists United™ Request Thread Low Cache CPU Club Solaris Utility DVD 3.0 DanishDevil's Logitech Soundroom TPU Video Gallery Sciencemark Revisited

Nov 7, 2009, 05:38 PM	#7
Sasqui Eligible for custom title Join Date: Dec 2005 Location: Manchester, NH Posts: 6,046 (2.22/day) Thanks: 816 Thanked 904 Times in 738 Posts System Specs	No luck... another fatal error on one of the workers... bumping up the CPU voltage __________________ Heatware

Nov 7, 2009, 05:40 PM	#8
Fitseries3 Eleet Hardware Junkie Join Date: Oct 2007 Location: Republic of Texas Posts: 14,993 (7.30/day) Thanks: 4,318 Thanked 3,285 Times in 2,186 Posts System Specs	pll used to be a big deal but not any more. you rarely need to change it at all. only at high OC's. im talking like 5ghz+

System Name:	Craigslist-nickle-and-dime
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Motherboard:	Gigabyte H55M-UD2H
Cooling:	poop
Memory:	3x2gb OCZ Platinum 1600mhz
Video Card:	Asus 6950 2gb DCII
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