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P8Z77 V-Pro Restart/ Freezing issue

post #1 of 22
Thread Starter 
Hi guys,

I have an issue with my Ausus P8Z77 V-Pro board that has me scratching my head. Every so often when powering up, the computer will no post and just shut off. Then turn itself back on and attempt to load into Windows 7. A good portion of the time it will lock up at the windows loading screen. I have a I5 2500K in there and it's overclocked to 4.6ghz stable (prime95 blend tested for 4hrs). PLL is also enable in bios. Is there anything else I'm missing?
post #2 of 22
It's an unstable OC when that happens. Remember that 4 hours of Prime doesn't guarantee a stable OC, specially that you only ran the blend test. Have you tried running it in small FTT to see if the CPU is completely stable? Also did you check if your RAM is stable? Is it running stock? If it is then it's definitely an OC on the CPU that is unstable.
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post #3 of 22
Thread Starter 
How long should I run prime in small FTT to see if my PC is stable?
post #4 of 22
You can run it in blend but need to manually set some parameters to ensure that it tests the CPU properly. If you just want straight up 1 click testing, small FTTs are the way to go. You have a Z77 Board and an Ivy so try to check out this thread:

CLICK HERE

Read the section "Overclocking" from top to bottom and that should give you a very good idea how to test if your OC is stable. This is a very detailed way to ensure your OC is stable.

If you want a quick and dirty way to find out if it's relatively stable, run small FTT for at least 4 hours and then see if your CPU crashes. Preferably people will tell you 12 hours at least with the 24 hour window the best.

Good Luck! thumb.gif
Edited by mark_thaddeus - 2/28/13 at 5:48pm
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post #5 of 22
Thread Starter 
Quote:
Originally Posted by mark_thaddeus View Post

You can run it in blend but need to manually set some parameters to ensure that it tests the CPU properly. If you just want straight up 1 click testing, small FTTs are the way to go. You have a Z77 Board and an Ivy so try to check out this thread:

CLICK HERE

Read the section "Overclocking" from top to bottom and that should give you a very good idea how to test if your OC is stable. This is a very detailed way to ensure your OC is stable.

If you want a quick and dirty way to find out if it's relatively stable, run small FTT for at least 4 hours and then see if your CPU crashes. Preferably people will tell you 12 hours at least with the 24 hour window the best.

Good Luck! thumb.gif

I followed the method described in the thread you referred me to and it seems my overclock should be fine. I didn't adjust a thing and ran prime with the setting they described and came out with no issues. I have since shut my computer down (gotta work ya know). Is there anything else I may be overlooking?
post #6 of 22
I just re-read your OP and I noticed you mentioned that you have PLL overvoltage enabled. Have you tried disabling that and re-running the tests? Sometimes it really depends on the chip if you need it @ 4.6. Most often than not 4.7 and above you may need it but at 4.5-4.6Ghz it's really a grey area.

Try that first and re-run small FTTs then report back your results. To be even sure, I would run IBT (Intel Burn test) for 20 runs and then small FTTs which found errors compared to the blend test mentioned in that post, so try doing this and then report back.
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post #7 of 22
Thread Starter 
I disabled PLL overvoltage and was promptly met with a hanging windows startup..I then restarted and was met yet again with a hang. Tried one more time, same result. I think It's safe to say i need PLL.
post #8 of 22
Yup it seems your chip definitely needs PLL. Try to increase offset voltage just by 1 notch and leave the turbo as is, since it seems you're able to run for 4 hours in turbo without incident. Try to run the stability tests and give us feedback!
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post #9 of 22
Thread Starter 
Sorry... I have no idea what offset voltage is or where its located in my bios.
post #10 of 22
Quote:
Originally Posted by Joe Schmoe View Post

Sorry... I have no idea what offset voltage is or where its located in my bios.

Under AI Tweaker of your BIOS, look for CPU voltage, set to manual, then what voltage did you set?

When I say up the voltage 1 notch I mean up it by whatever the next voltage step is in the BIOS.
Edited by mark_thaddeus - 3/3/13 at 3:24pm
Equinox
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Intel i7-4790k Asus Z97I-Plus Galaxy 780 Ti HOF Edition Kingston Hyper X Fury 16 GB 1866Mhz 
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Equinox
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CPUMotherboardGraphicsRAM
Intel i7-4790k Asus Z97I-Plus Galaxy 780 Ti HOF Edition Kingston Hyper X Fury 16 GB 1866Mhz 
Hard DriveCoolingCoolingCooling
Crucial MX100 512 GB Corsair H55 dual fan (CPU) NZXT G10 Corsair H55 (GPU) 
OSMonitorKeyboardPower
Windows 7 Pro SP1 Asus PB278Q DK-9087 MX Red White Leds Seasonic 660X 
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