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3930K OC experience

M

Meeho

Supreme [H]ardness
Joined
Aug 16, 2010
Messages
6,110
What do yours run at? It seems I got a poor one as it requires 1.416V (CPU-Z) for 4.5 GHz. It runs with less in IBT or Realbench, but gets BSOD (0x101 usually) under 1792K Prime95 after several hours. Temps peak at 83C with Noctua NH-D15s.
 
4.6ghz solid for 4 years. Not much extra voltage needed, I dont remember how much.
4.7 was unstable no matter what I did to it.

4.5 isn't poor for a 3930k.
 
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I'm pushing for 4.5 so haven't spent much time on 4.4 but it was several hours stable with 1.37X IIRC. 4.6 was a no go even at 1.45V.
 
Those temps are only during stress testing with Prime/IBT so I'm good there. Was a bit dissapointed because many are reporting 4.7-4.8 clocks with 1.3x V.
 
It seems it's a dud after all. Requires 1.432-1.440V for 4.5 GHz for complete Prime stability. Had to dial back to 4.4 GHz. Currently testing around 1.40V.
 
Mine is a bit above average it does 5GHz@1.4V (1.392 max measured by cpu-z), but normally i run it one multi bellow that @4875MHz because i can lower vcore by a good bit.
 
When I had my 3930K it ran at 1.3V at 4.3GHz. Pushing it more than that and my cooler wasn't good enough (for me - 80C is the max I would accept).
 
Going out on a limb here, but have you tried a different cooler or re-applying your TIM? Could be holding back some degrees of freedom here on one of those respects!
 
5GHZ+ said:
Mine is a bit above average it does 5GHz@1.4V (1.392 max measured by cpu-z), but normally i run it one multi bellow that @4875MHz because i can lower vcore by a good bit.
Click to expand...

Yeah, a bit above :)


arestavo said:
When I had my 3930K it ran at 1.3V at 4.3GHz. Pushing it more than that and my cooler wasn't good enough (for me - 80C is the max I would accept).
Click to expand...
2dFx said:
Going out on a limb here, but have you tried a different cooler or re-applying your TIM? Could be holding back some degrees of freedom here on one of those respects!
Click to expand...

It's a top of the line cooler, doesn't get better than that unless I go with water. I've reapplied the TIM when I was experimenting with application methods. It's not the heat that is holding it back. Those are synthetic AVX peaks, it runs mostly in 70-80C range in those and 50-70 in real life load.

I've got a parallel build I'm working on for a friend with similar components and also a 3930K and that one is a much better overclocker. It needs about 1.38V for 4.5GHz and is happy to go higher while mine needs 1.41V for 4.4GHz and requires massive increases in voltage to go higher. What I found interesting is that that one also failed more gracefully during stability testing. It would mostly drop threads in Prime95 or had wrong calculations in IBT, while mine always BSOD-ed if it was pushed too far or didn't have enough voltage.
 
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