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Discussion Starter · #1 ·
I've been running my i5 3570K at 4.2Ghz just because I didn't feel like seeing what it was capable of quite yet. Today I got adventurous and wanted to find the maximum clock I could achieve without altering voltage. 4.4Ghz was fine but I didn't test it thoroughly. I went for 4.5 and ran Prime95 for almost an hour. Good temps, no crashes, system acting fine, and most importantly, 0 errors and 0 warnings reported in Prime95. However, I did notice that my PCIe wireless networking card acted up shortly after setting the clock to 4.5. It basically stopped working but recovered after about 2 minutes (it's never done this before). After about an hour, I go to stop Prime95. Reports no errors, I figure I'm in the clear. About 60 seconds later I get a BSOD saying "WHEA_UNCORRECTABLE_ERROR" and I immediately assumed I pushed my CPU too hard without enough voltage. But then I remembered this particular error relates to the failure of some piece of hardware, and I thought about the wireless card acting weird. It's probably important to mention I'm running Windows 7 drivers for the card on a Windows 8 OS because Cisco messed up and disabled the 5Ghz band with the Windows 8 drivers for my particular card.

I just don't understand how the crash could be related to the CPU if it ran Prime95 for almost an hour with no errors or warnings, and crashed AFTER I stopped Prime95. Is this particular usually associated with unstable CPU overclocks?
 

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I have no doubts that its related to your vcore . I doubt stock vcore will get you stable at 4.5. Prime95 for and hour is nothing , around 12 hours is best. Even if Prime does not crash your rig if you look at your event log and get WHEA errors it means you are almost stable. The number I recall for 4.5 is around 1.25 V.
 

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Discussion Starter · #4 ·
oh wow, I thought 12 hours of torture testing was a bad idea but I guess not. I've really only overclocked GPUs and those run shorter tests. I bumped Vcore up to 1.25, which may be a bit overkill, but 4.5 has been Prime95-stable for a couple of hours now. I'll keep going
 
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