Core i7/X58 Overclocking Thread

[dejanh]

Hello, I have a strange problem with the configuration in my sig: I am stable at 4Ghz with temps below 80 if I use a 160x25 multi, but with 167x25 I can't get it stable for the life of me.

My voltages:

vcore 1.34375
dram 1.64
qpi/dram 1.35

I don't think raising the vcore should be necessary since the cpu frequency doesn't change. Which voltage do you suggest I tweak? I think qpi would help a lot, but can I safely go above 1.35 with that one? I seem to remember 1.35 as the limit declared by Intel. Am I wrong?

Um, I think you got something mixed up here...

25x160MHz = 4.0GHz
25x167MHz = 4.175GHz

That's 175MHz difference between the two. Up your core voltage to about 1.40V and try from there...no need to increase QPI/DRAM voltage. Chances are however that unless you have a very good chip (i.e., one of the golden ones that run low volts and high clocks) you will most likely need about 1.46V - 1.47V at that clock though.

That is interesting with the bios differences in turbo between Asus an GB, thanks for the info. Also good to know you found .01 to .02v lower on higher bclk same mhz clocks...I am 2 notches lower so far (.012), I need to keep going and see how low can get vcore.

No kidding with temps, even my dedicated PA120.3 for just cpu with GTZ is barely keeping my temps in check on prime load...hovers at 77C after 10hrs, 79-80max.

Yeah, indeed. The temps are nuts on these chips. They seem to run hotter than even the 140W AMD parts One thing I am concerned about is that if I buy a nice WC system, and it only ends up shaving like 10C - 15C off the temps that may just get me about 4.2GHz (4.3GHz if I am extremely lucky) out of the chip for 24/7 use and I am not really sure that is really worth it for having spent like $400-$500 on a nice WC system...

After all, I am not going for any OC records here really...