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Can't keep my i7 975 stable @ 4GHz on air

post #1 of 19
Thread Starter 
Hi guys! I've just recently joined the forums, so welcome to everybody smile.gif

I finally have the chance after 3 years to overclock my i7 975. However, i've seem to have hit a wall when overclocking.
I can move my machine from the stock 3.33GHz to a stable 3.8GHz. When I tried anything above that, it could sometimes do well for 1-2 hours, but during prolonged periods of stress testing, it reboots (screen turns glitchy and then restarts, no BSOD).

My setup is as follows:
CPU: Intel i7 975
CPU Cooler: Noctua NH-D14
Motherboard: Gigabyte EX58-UD3R
RAM: 8GB Dual Channel Patriot @ 1600MHz 9-9-9-24
PSU: Antec HGC-520W
Case: HAF 932
GFX: MSI 2GB R6950

Even if I add more and more voltage on the CPU VCore (1.275V, 1.28V 1.3V), I can't seem to get it stable.

Here are some of my suspicions:
1) The power supply could not supply enough power to the system, thus triggering an unexpected reboot.
2) My CPU might have hit the limit for the heat (maybe?)

Any constructive input would be appreciated!
Edited by classycanadian - 11/11/12 at 8:14pm
post #2 of 19
option 2, have you consider water cooling? I'm using i7 920 @4ghz 24/7 for 3 years now...
Edited by Raptorpowa - 11/11/12 at 7:55pm
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post #3 of 19
Thread Starter 
Quote:
Originally Posted by Raptorpowa View Post

option 2, have you consider water cooling?

It has never occurred to me. I guess the reason why I like air cooling is the minimal amount of maintenance that is required.
post #4 of 19
Quote:
Originally Posted by classycanadian View Post

It has never occurred to me. I guess the reason why I like air cooling is the minimal amount of maintenance that is required.

never touch it for three years now except changing video cards and clean dust filter....occasionally, adding distilled water to reservoir...I think it's less maintenance and minimal dust accumulation than air cooler...also very quite smile.gif
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post #5 of 19
Mess with the VCore not VTT biggrin.gif
post #6 of 19
Thread Starter 
Quote:
Originally Posted by Socks keep you warm View Post

Mess with the VCore not VTT biggrin.gif

Oh, sorry I meant VCore, not VTT mellowsmiley.gif
post #7 of 19
Quote:
Originally Posted by Socks keep you warm View Post

Mess with the VCore not VTT biggrin.gif

yeah.. this. at 4ghz you shouldnt have to tweak the QPI a whole lot unless you were overclocking your memory a ton. i think I set mine to 1.325.

what is your core voltage at?
post #8 of 19
Quote:
Originally Posted by RX7-2nr View Post

yeah.. this. at 4ghz you shouldnt have to tweak the QPI a whole lot unless you were overclocking your memory a ton. i think I set mine to 1.325.
what is your core voltage at?

mine is at 1.28 v core...underload 55 C.
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post #9 of 19
Thread Starter 
Quote:
Originally Posted by RX7-2nr View Post

yeah.. this. at 4ghz you shouldnt have to tweak the QPI a whole lot unless you were overclocking your memory a ton. i think I set mine to 1.325.
what is your core voltage at?
The highest I've set it to was 1.3V. I'll give your settings a go and see what happens.
post #10 of 19
Quote:
Originally Posted by classycanadian View Post

The highest I've set it to was 1.3V. I'll give your settings a go and see what happens.

your'e going to be hot with 1.3..he's on water.....
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