quick question about i7 920

[mkultra]

check your ram voltage since anything over 1.65v will eventually hurt your cpu.

where this comes from?
lots of people including me have been running 1.70+ 24/7 for a long time and never had issue

not that you should do it, but it won't magically kill a 1366 cpu

[Bubbzilla]

changed vcore to 1.25

is sitting around 62 now at full load

[Sagath]

Originally Posted by Arinoth

How long did you run prime 95 for, intel burn test is actually a better/more accurate way to stress overclocks these days shy of big work unit folding.

IBT is the way to go, Prime 95 is outdated for stress testing IMO. I am 100% confident in IBT to get the job done. Not to mention it is way faster. 40 passes at 8 threads, maximum RAM usage usually takes about 2 hours to run through, and your CPU will crap out well before 10 runs (3 min a run or there abouts) if its not stable. This has yet to let me down on stability. I follow up the 40 passes with Folding@Home. Has worked for 3 CPU's now.

But first and foremost, lets worry about your temps. Drop your voltage, try 1.28 first at 3.6(ish) and see what your temps are at. You may need a better cooler.

[zoob]

From my experience most i7 920 D0s can hit about 3.6 GHz on stock voltages (helps if your motherboard has a "Normal" voltage setting).
Try turning Turbo Boost off, as it may enable 22 multiplier when only one core is active. It can throw off four-core loaded stress test results.

[Arinoth]

Originally Posted by mkultra

where this comes from?
lots of people including me have been running 1.70+ 24/7 for a long time and never had issue

not that you should do it, but it won't magically kill a 1366 cpu

Ram is rated for 1.65V typically, beyond that you are over-volting them causing them to run hotter and shortening their life span

[Bubbzilla]

have it at 1.275 V and 3.6gHz running between 65 and 70C

what should V be at 4.0gHz ?

[Arinoth]

Have you not been listening to us, you need to run it for several hours to double check that it is stable and that your temps don't go too high. You're vcore could very well be 1.4 and drive your cpu over 80C and still not be stable or could run i at 1.35 with no temp problems yet stability issues.

[Chris]

Originally Posted by mkultra

where this comes from?
lots of people including me have been running 1.70+ 24/7 for a long time and never had issue

not that you should do it, but it won't magically kill a 1366 cpu

I have seen threads here and in other forums that the cpu gradually could not hold the oc originally set at (4.0GHz), and eventually can only run at 3.2GHz or less. I don't quite remember the details, IIRC the high vdimm seems to affect the cache of the cpu. It is not a scientific proof, but I would not risk my $300 cpu.
Also the thread that I quoted is indeed for C0, but it generally applies, only that you can set vcore of D0 lower than C0.

[mkultra]

Originally Posted by Chris

I have seen threads here and in other forums that the cpu gradually could not hold the oc originally set at (4.0GHz), and eventually can only run at 3.2GHz or less. I don't quite remember the details, IIRC the high vdimm seems to affect the cache of the cpu. It is not a scientific proof, but I would not risk my $300 cpu.
Also the thread that I quoted is indeed for C0, but it generally applies, only that you can set vcore of D0 lower than C0.

idk, i wouldn't be worried about that myself, but i guess i'm more of a power user than some. I've used 1.74v on my Corsair GT since i had my w3520 in the meantime i've had a w3540 and now a 980x and i'm still running 1.74 with no degradadation still running 4.5ghz @ 1.375 on the 980x for months.

Originally Posted by Arinoth

Ram is rated for 1.65V typically, beyond that you are over-volting them causing them to run hotter and shortening their life span

lol i know that....overclocking is always a gamble but the guy was talking about killing a CPU with more than normal VDIMM not the RAM itself.