i7 4.0 ??

InfernoUk · 30 Dec 2008 at 23:15

1.4 in bios and 1.4 under stress test

fornowagain · 30 Dec 2008 at 23:17

Great, turn off the hyperthreading for a bit and have another crack at 200x20. Same voltage vcore, VTT (QPI/DRAM) a bit lower.

InfernoUk · 30 Dec 2008 at 23:21

blue screened at windows launch with 20x200 1.4V HT Off

fornowagain · 30 Dec 2008 at 23:25

Looks like the 190 is the limit. Or somewhere just above it. 3.8Ghz then. Probably best to work your way down from 1.4V, drop VTT the same amount each time. Maybe 1.35V vcore, 1.325v VTT. Prime again.

InfernoUk · 30 Dec 2008 at 23:26

HT Enabled again?

fornowagain · 30 Dec 2008 at 23:28

InfernoUk said:
HT Enabled again?

Yeah if you can get away with the temps, its worth having it on for sure. Won't make much difference to stability, just takes a lot off the temps which can be a wall at the higher volts. I'd rather have 8x3.8 than 4x4.

InfernoUk · 30 Dec 2008 at 23:29

i just switched to 19x211 and got into windows running prime 95 worker 1,2,4 all crashed instantly with 3 still going using 1.4v anyway to work with this or no? (HT Off)

edit: closed and re ran, instant blue screen, could i try for 3.9?

fornowagain · 30 Dec 2008 at 23:33

InfernoUk said:
i just switched to 19x211 and got into windows running prime 95 worker 1,2,4 all crashed instantly with 3 still going using 1.4v anyway to work with this or no? (HT Off)

edit: closed and re ran, instant blue screen, could i try for 3.9?

Yeah absolutely, these chips flip like a switch. e.g. 194 good, 195 bad. No Idea why though. You could nudge the voltage a touch, 1.43v (1.4 VTT) HT off. 1.45v won't kill it, but its going to get hot.

InfernoUk · 30 Dec 2008 at 23:35

what Vcore Multi and Baseclock do i need for 3.9? ive only every used 20x190 and 19x211

fornowagain · 30 Dec 2008 at 23:38

195x20 or 206x19, use the 1.4v vcore (VTT -0.25v) and work down if its solid or up if its fails from there.

InfernoUk · 30 Dec 2008 at 23:41

prime 95 running now at 3.9 max temp seems to be 78 ill post pics in 10mins of testing

edit: vcore is at 1.35 by the way and its going ok so far

InfernoUk · 30 Dec 2008 at 23:51

ok ran for 10mins at 3.9 no issues heres the temps etc

look ok? or temps to high, hwere do i go from here? overnight test on prime 95? or dosent it need it also could i get away with any lower voltages to get lower temps. thanks

EDIT: not the lowest in that pic is not right i restarted it during a prime 95, they are idle at 41 degrees per core max.

fornowagain · 30 Dec 2008 at 23:56

I'd let than run a few hours, overnights good. If its solid, try a bit more baseclock, +1MHz at a time or try to drop the voltage one notch at a time. Your call, temps are ok (not great!!), you'll never see that in normal use though.

InfernoUk · 30 Dec 2008 at 23:59

ok ill leave it going and post bak tommoro afternoon, thanks ill see what to do from there

InfernoUk · 31 Dec 2008 at 01:30

just a quick post, it blue screened after 1 hour 30mins ish. is that ok or are there any changes i can make to fix this and keep the 3.9?

fornowagain · 31 Dec 2008 at 01:32

Up the vcore a notch or two 1.38v ish, you're not far off.

InfernoUk · 31 Dec 2008 at 11:30

ok raised the voltage and primed for 1 hour 30 so far, still going and its still stable. is it good to call it safe yet? or is there anything else i need to do.

fornowagain · 31 Dec 2008 at 13:53

The general consensus is 8 hour's, don't ask me why. Its a purely subjective thing, if you're happy with it fair enough. I'm a little more rigorous, testing the memory and such, I hate corrupted files or a damaged os. I use another boot drive for benching with flaky clocks.

InfernoUk · 31 Dec 2008 at 14:05

is there anything else i need to do to ram etc, or will it be fine with what ive done now? ive seen stuff about ram timings but i dont know what they effect or how to set them. pc is still stable after 3 hours so ill leave it here and run again when i next go out.

fornowagain · 31 Dec 2008 at 14:16

Post a screen of the memory page on cpu-z. I'll have a look.