I have a Maximus IV Gene Z68, i5 2500K, 2x 4GB 1333MHz Corsair Vengeance (9-9-9-9-24). Auto tuned to 4.4GHz with 1.38v, it's unstable. Tried with bios EZ profile at 4.6GHz with 1.35v, also unstable. Right now running at 4.2GHz but I have yet to stress test it (not at home right now).

What could be the problem of the unstable OC? I thought 1.35v is more than enough for those speed. During BSOD I recall reading somewhere about clock speed error.

Or could it just be my PSU? But it's a 750w Strider 80+ silver and I only have one HD6950 in the rig.

@owikh84
Thanks for the tips. Gonna try that when I get home.

@Dennos
Uh, not sure.
EDIT: Mine is Malaysian chip.

This post has been edited by hahariz: Jan 14 2012, 01:21 AM

Finally have the time to test my OC. Went for 4.2GHz on 1.3v, still not stable. Now running Prime95 with 4.6GHz on 1.4v, I hope it's stable. :s

Off topic; does expensive thermal paste are actually better? Any good thermal paste for recommendation?

This post has been edited by hahariz: Jan 30 2012, 05:23 PM

Will look into Arctic MX4.

Still running Prime95. I just realized 1.4v is quite hot. One of my cores reached 70c on H80 with a pair of Noiseblocker M12P. :s

4.6GHz at 1.37v, not stable. Keep getting x101 error.

Yeah I think I got a shit chip. I'll just settle with 4.2GHz. :\

It is stable on 1.4 but I've been reading everywhere that people have been running 4.6GHz on 1.35-1.37v.