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7F BSOD, when not overclocked...

Muel

Muel

Muel

Soldato
Joined
26 Jun 2009
Posts
3,023
Location
Sheffield
Howdy,

When I used to overclock, I used to get the 7F BSOD all the time. I but my system back to stock nearly a year ago however, and haven't seen another since.

I just got another one, just wondering about what to do really, torture test it and see if it's stable? All the readings seem fine.
 
Yeh they were then, but now I'm at stock.

Just had it again, 1 day later so it isn't a one-off. Torture testing it now with Prime95. If it turns out that it's unstable at stock then what do I do next? CPU RMA?
 
Is there something special about an "7F BSOD" or is it just a regular BSOD? :confused:

gOOgle has lots of hits about that? . . . never heard of it myself?

Assuming your system is stock/auto voltages I would run Memtest86+ V4.10 on the memory for a few hours to see if that was all working fine? . . . I would download and run a diagnostic for the hard-disk from the manufacturer and I would also test the power-supply with a PSU tester . . .

If none of that found the error I would re-install the O/S (or recover it from a clean-install backup) in case it was corrupt . . .
 
The 7F BSOD's correct title is STOP 0x0000007F (UNEXPECTED_KERNEL_MODE_TRAP).

I don't understand exactly what it means, but what I do know is that it most commonly appears when your CPU is unstable for whatever reasopn. It can also appear though for RAM or Software problems too...

I don't have a PSU tester, but I shall test the RAM and hard drives.

I only did this install of Windows a couple of months ago. Grrrrr.

Again, thanks Wayne. :)
 
Just a mini update, it seemed to be sorted, but then I realised CnQ wasn't working, so I enabled it again, and I got 2 BSODs in one night.

I reckon that it's CnQ that was making it ubstable, so I've disabled it and I'm running Prime95. 5.5 hours so far.

Is this RMA material if it is proven to be CnQ being troublesome? It should be really IMO, as instead of using 20.50w for most of it's life it'll now be using at least 131w, more if it's overclocked.
 
Well I used to get BSOD 7Fs with C-states enabled. The reason you get them is because the voltage is being dropped too low when the CPU cores are put to sleep (something CnQ would do also). If raising the voltages doesn't help, the CPU could be damaged I suppose.
 
Well yesterday it survived 14 hours of Prime95 without crashing. Looks like CnQ makes my system unstable.

I'm not gonna bother going down the RMA route unless it starts to fail with CnQ turned off, it takes time and effort and I can spare neither of those things at the moment. :p
 
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