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

Sasqui · 11-07-2009, 05:40 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 · 11-07-2009, 06:02 PM

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

Sasqui · 11-07-2009, 06:14 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 · 11-07-2009, 06:16 PM

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

JrRacinFan · 11-07-2009, 06:19 PM

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

Sasqui · 11-07-2009, 06:28 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 · 11-07-2009, 06:38 PM

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

Fitseries3 · 11-07-2009, 06:40 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 · 11-07-2009, 07:02 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

11-07-2009, 05:40 PM	#1
Sasqui Join Date: Dec 2005 Location: Manchester, NH Posts: 3,001 (2.08/day) Thanks: 101 Thanked 196 Times in 182 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

Processor:	Core2 E6600 @ Whatever Ghz I feel like :)
Motherboard:	Gigbyte 965P-DQ6 V1.0
Cooling:	SWTech 320 Rad, Modded 655 Pump, Dtek V2 Fuzion
Memory:	4GB G.Skill DDR2-1066 5-5-5-15
Video Card:	VisionTek HD4870
Harddisk:	WD 250 / 500 / 500 /640
CD/DVD Drive:	NEC 2540
CRT/LCD Model:	24" DELL 2405FPW
Case:	Modded HAF 932
Sound Card:	SB X-Fi Platinum / Klipsch PM 4.1
PSU:	Hyper TypeR 580w Modular
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11-07-2009, 06:02 PM	#2
JrRacinFan Served 5k and counting ... Join Date: Mar 2007 Location: Youngstown, OH Posts: 9,197 (9.39/day) Thanks: 1,789 Thanked 1,984 Times in 1,872 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

System Name:	Jupiter
Processor:	Phenom 9850BE
Motherboard:	DFI 790FX
Cooling:	Xigmatek S1283 Rocketfish rebadge - Stock video card
Memory:	2GB Tracers @ 1066 5-5-5-18 w/Xigmatek Cuirassier
Video Card:	MSI 8800GTS 512MB
Harddisk:	WD 320GB & Maxtor 500GB
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CRT/LCD Model:	Philips 42" HDTV
Case:	Lian Li Rocketfish rebadge
Sound Card:	Onboard Realtek
PSU:	Silverstone Strider 600W
Software:	Windows 7 Build 7100

Processor:	Core2 E6600 @ Whatever Ghz I feel like :)
Motherboard:	Gigbyte 965P-DQ6 V1.0
Cooling:	SWTech 320 Rad, Modded 655 Pump, Dtek V2 Fuzion
Memory:	4GB G.Skill DDR2-1066 5-5-5-15
Video Card:	VisionTek HD4870
Harddisk:	WD 250 / 500 / 500 /640
CD/DVD Drive:	NEC 2540
CRT/LCD Model:	24" DELL 2405FPW
Case:	Modded HAF 932
Sound Card:	SB X-Fi Platinum / Klipsch PM 4.1
PSU:	Hyper TypeR 580w Modular
Software:	WinXP Pro SP3

11-07-2009, 06:16 PM	#4
Sasqui Join Date: Dec 2005 Location: Manchester, NH Posts: 3,001 (2.08/day) Thanks: 101 Thanked 196 Times in 182 Posts System Specs	Crap, just failed a thread. Thankfully, it fails gracefully... __________________ Heatware

11-07-2009, 06:19 PM	#5
JrRacinFan Served 5k and counting ... Join Date: Mar 2007 Location: Youngstown, OH Posts: 9,197 (9.39/day) Thanks: 1,789 Thanked 1,984 Times in 1,872 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

11-07-2009, 06:38 PM	#7
Sasqui Join Date: Dec 2005 Location: Manchester, NH Posts: 3,001 (2.08/day) Thanks: 101 Thanked 196 Times in 182 Posts System Specs	No luck... another fatal error on one of the workers... bumping up the CPU voltage __________________ Heatware

11-07-2009, 06:40 PM	#8
Fitseries3 Eleet Hardware Junkie Join Date: Oct 2007 Location: ATX Posts: 11,917 (15.35/day) Thanks: 3,284 Thanked 2,215 Times in 1,603 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+ __________________ ““The best engine in the world is the vagina !!It can be started with one finger, is self-lubricating, takes any size piston and changes its own oil every four weeks. It is only a pity that the management system is so f***ing temperamental!!!””

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