i7 920 overclocking thread

[Blameless]

Originally Posted by speedy2721

I also thought it is weird how I can pass Linx over and over again but Prime fails in 10min.

This has been known to happen. Prime95 and Linpack do vastly different things.

On an HT enabled CPU Prime is very nearly as demanding as Linpack. This is because the gaps in the pipeline that Prime95 would usually leave are filled by another thread of Prime95, where as Linpack would have left very few resources unused, so HT Linpack sees a much smaller increase.

Also, Linpack tests tend to only continually load all the cores for a few seconds at a time, then they cycle through each core, before loading everything again.

Prime95 loads all cores/threads the entire time it runs, except for the split second in needs to start the next test.

I currently favor running LinX, Prime 95 FFTs in the background, to mop up what cycles LinX does not use, and FurMark (to heat everything up) simultaneously.

[FearlessLdr88]

New Bios for P6T6 Rev. out
http://support.asus.com/download/dow...Language=en-us

http://www.bit-tech.net/hardware/cpu...-core-i7-920/3
This might help as well.

[Patch]

I'm quite new to this having done my first build/oc venture last summer with an E8400, but I'm hooked. I get the insomniac thing now.

Any advice for going further with my i7?

4.3 ghz
215X20
Vcore 1.5
IOH 1.30
Hyperthreading enabled.
Turbo off.

1600 Mushkins are still underclocked at 1292 at 1.65V.

Probably not horribly stable, but I'm typing on it right now after doing Prime Blend for 15 min with load temps averaging 72 C (max 77).

Will I get much more of a clock with hyperthreading off? Just for the stable clock numbers, I mean - not for overall performance.

How about decreasing the multi while upping the base clock?

.....I know you can't know till you try and I'll be doing those things anyway. Any suggestions for something I'm not thinking of?

[P£P§!]

@ Patch: Nice over clock and really nice temps...if i could get my temps that low i bet i could go higher for now im stuck at 4.2Ghz because of the heat if i go higher it will probally damage the chip.

My Overclock:
4.2Ghz @ 1.35
200x21
Turbo Enabled
HT Disabled

[Shadowclock]

So I did some more tests, turned off all my energy savers, I am still stuck at 3.6 with

CPU Ratio 19
BCLK 190

CPU V 1.275
QPI V 1.275
RAM V 1.64

I am still running much hotter then I want to be (78 on Prime95 with 8 tests). Maybe its the cooler....it doesn't get the best reviews (now that I have seen some)....I might just leave it as is for now. I don't really do anything to really stress my system.

I might upgrade to a True in the next 6 months or so and try again but at this point I think I will have to stick with the 3.6 I have.

[Jakethesnake011]

It is probably the cooler, I had one before a thermaltake v1 cooler and my temps went up into the 80s with a 3.7 overclock, so I could see it being the cooler. The true is awesome I have upgraded to one myself and I am very happy in doing so. Worth the money. Now why don't you try to increase your cpu multiplier? To say 20 or if your mobo bios will let you go to 21, kind of a permanent turbo mode. My MSI x58 lets me turn off EIST and then turn my multiplier up to 21 manually. Try say a base clock of 185 and a multi of 20? It is a guessing game which sucks man It takes up so much time but is worth it. Best of luck

[Shadowclock]

Switched it to auto, so now I have a multi of 20. Lowered the BLCK to 180 because no matter what voltages between 1.25 and 1.3 could I get it stable beyond that. So now I am at 3.6 and temps aren't getting above 74 so I am pretty happy with it for a 24/7 clock.

I could try some more aggressive voltages or ratios but since my temps are so close to leaving my comfort zone I don't really want to mess with it. Oh I also tried turning turbo back on to hit the 21 multi and got a BSOD.

I would love to sit at 3.8 but I really think my cooler is holding me back with temps.

I appreciate all the help Jake. I'll get the True probably the same time I get my Vertex SSD and we will take another whack at this whole thing.

Only hitting 17.1k on the 3Dmark06 unfortunately. Anything I need to tweak up to get that higher or is that about right with my rig?

[Jakethesnake011]

17k including GPU? could be that holding you back but with my i7 at 3.7 and my 4850x2 I was able to get into the 21k area.

[Shadowclock]

17.1k including GPU, yes...standard test...of course I am running with 1 x 4870. Will be upgrading in another few months to Crossfire.

[Jakethesnake011]

seems a little low to me, but gpu's can pull down a good cpu score a lot. Why not test the cpu alone and see how it fars and compare online?