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2600k/P67A-UD5 OC Help

post #1 of 12
Thread Starter 
I just got finished setting up my computer and installing windows. I've had a little bit of time to futz around with the Bios and update it to version F5X, which includes PLL overvoltage. Problem is I can't seem to get this thing prime 95 stable even at 4.5GHz. I increased Vcore to 1.375 and QPI/VTT to 1.1. I also installed only 2 sticks of RAM until I get things fairly well set up and stable. I would appreciate it IMMENSELY if somebody could give me some advice.

I've been following Sin's overclocking guide to this point.

Thanks!

Here's a picture of all the new hardware (my sig is updated and indicative of everything I'm running):

Edited by cmeeks - 1/14/11 at 2:32pm
    
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post #2 of 12
Quote:
Originally Posted by cmeeks View Post
Problem is I can't seem to get this thing prime 95 stable even at 4.5GHz. I increased Vcore to 1.375 and QPI/VTT to 1.1.
That is an accomplishment already. My system won't even boot at 4.5 GHz unless I set Vcore to 1.40 or higher. I think that something's wrong with Gigabyte BIOS.
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post #3 of 12
i donno increase your LLC?
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post #4 of 12
Quote:
Originally Posted by hamster3null View Post
That is an accomplishment already. My system won't even boot at 4.5 GHz unless I set Vcore to 1.40 or higher. I think that something's wrong with Gigabyte BIOS.
enable cpu pll helps alot i couldn't hit 4.8 at 1.43V and by enabling cpu pll i can get it stable at 1.33V
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post #5 of 12
Thread Starter 
Also, is there a program that will accurately measure my voltage? CPU-Z is way off.
    
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post #6 of 12
Quote:
Originally Posted by puffsNasco View Post
enable cpu pll helps alot i couldn't hit 4.8 at 1.43V and by enabling cpu pll i can get it stable at 1.33V
What does CPU PPL do exactly?
post #7 of 12
Quote:
Originally Posted by puffsNasco View Post
enable cpu pll helps alot i couldn't hit 4.8 at 1.43V and by enabling cpu pll i can get it stable at 1.33V
PLL helps some. Load line calibration helps some more.

At Vcore 1.375 V, QPI/Vtt 1.100 V, PLL off, LLC auto, my system runs stable up to 4.4 but won't even boot at 4.5.

With "automatic PLL overvoltage" on, it boots into the operating system at 4.6 but blue-screens under load.

Turning "load-line calibration" on makes it stable at 4.6.

Looks like my chip needs about 1.32 to 1.33 V internally to run at 4.6. At the default LLC setting, vdroop will drop the voltage from 1.375 to 1.31 and then I start seeing bluescreens / prime95 failures. Gigabyte's LLC=on helps keep the voltage above 1.32 V.

Let's see if I can get 5 GHz with a higher vcore setting now.
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post #8 of 12
5 GHz does not seem to be happening. The system refuses to boot even with vcore set to 1.44.
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Raidmax 1000AE Cooler Master Elite 371 
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My System
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Intel Core i7 3820 Intel DX79SI NVIDIA GeForce GTX 590 NVIDIA GeForce GTX 590 
RAMHard DriveOSMonitor
G.Skill Ripjaws 4 x 8 GB 240 GB Intel SSD Linux Asus VG236E 
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post #9 of 12

Have you guys tried OCing with Turbo Mode ON, Then set TDP to 300, and Set TDC to 300, keep C1E and EIST disabled. IDK about that beta BIOS for the UD3, I was surprised when they added CPU PLL Overvoltage to it. basically CPu PLL overvotlage lets your chips PLL overcome 4.5-4.8ghz barrier.

you somthings have to push more than 1.45v through it, 1.5v is not taboo if you can handle the heat. 1.55 is no odd for 5ghz+ either.


use Easy Tune 6.

Also different versions of BIOS make a huge different.

TRY WHAT I SAID FIRST< THEN TRY WHAT THIS GUYS SAYS, as i believe you are hitting TDp and TDC limits.

here idk maybe this can help you guys:


Edited by Sin0822 - 1/14/11 at 7:13pm
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post #10 of 12
Thread Starter 
Thanks for posting that Sin - that's extremely helpful. For the time being, I have not tried turbo overclocking because when I try changing the 4th one everything switches back to auto.
    
CPUMotherboardGraphicsRAM
i7-2600k Asus P8Z68 Deluxe MSI N250GTS TwinFrozr 1G OC 2x4GB Corsair XMS3 2133 (9-11-10-28) 
CoolingMonitorPowerCase
Corsair H50 Dell U2412HM Corsair TX650W Corsair 650D 
Other
D-Link Wireless N 300 PCI Adapter 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i7-2600k Asus P8Z68 Deluxe MSI N250GTS TwinFrozr 1G OC 2x4GB Corsair XMS3 2133 (9-11-10-28) 
CoolingMonitorPowerCase
Corsair H50 Dell U2412HM Corsair TX650W Corsair 650D 
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