TPU's Core i7 Overclocking and Feedback

[mudkip]

It's a D0

Superpi screenshot attached

<--- Full system specs on the left

Nice I'd like to see low voltage overclocks from you.

http://forums.techpowerup.com/showpost.php?p=1464032&postcount=5429

 

[domy85]

Wow, I think I have a REALLY good chip!

4.2Ghz 100% stable running on CPUZ vcore of only 1.184v (set to 1.23750v in BIOS)

HT enabled

Turbo enabled

All I did was increase blck to 200. I then set about decreasing the voltage. AUTO had it somewhere around ~1.4v but i've brought it all the way down to 1.23750v without a single problem. That's it!

I did try disabling HT and temps dropped by around 10C but I lost over 1000 CPU marks on 3Dmark06, and my video encoding speed decreased by about 20%. So I've re-enabled it. After all, we want better PERFORMANCE, not just higher clock speed. If 4.2Ghz HT enabled is faster than 4.5Ghz with HT disabled, I'll leave it on!

Jebus, that is frickin nice . I want a D0 now. The last cpu I ever got to 4.2ghz stable was my QX9650, but the voltage was nowhere near that!

 

[aquax]

I'm Glad to say that worked. I was able to hit 4ghz, but it was setting voltage to 1.45 and wasnt stable after windows loaded. It was stable at 3.8ghz @ 1.4v which I am happy with. Heres a screen shot of my bench. My video card lost about 600 points, but my cpu jumped 3,000 points. Possibly bottleneck on a 4850x2? I am looking into a 2nd one in the next few months probably anyway. I set my multiplier at 19 to achieve 1600mhz on my memory.

26k CPU Score @ 3.8GHz? I saw 4GHz getting 25k CPU Score, what is your uncore setting to?

 

[wolf]

So this ram; http://www.techpowerup.com/reviews/GSkill/Trident_16000_6GB_Kit/ has landed here and is quite cheap...

thing is i know i'll have to run my uncore at 4ghz+, and with my 1600 ram, havent had it above 3600.

Will more voltage be needed to get the uncore up to that speed?

 

[mudkip]

If you try to get uncore above 4000Mhz , I wish you good luck.



somehow it's just impossible.

Everything under 4000Mhz is rock stable but above 4000Mhz was a no go for me, no matter what I did. but maby you'll have more luck

 

[wolf]

see thats a problem cos i really really want 2ghz rams

but if i cant run them at 2ghz i will cry

 

[Jakethesnake011]

I am having some problems with my ram timings I think. I am running some 1866 OCZ platinums rated for 9-9-9-24. I have them running at 7-7-7-21, at 1.648V, and I am running 1.375V QPI. I am not able to pass LinX with them after 3 runs, although I can pass many runs of 32m Super-pi? I am about to try Memtest 86+ 2.11, any ideas? the ram is running at 800mhz now.

 

[Davidelmo]

see thats a problem cos i really really want 2ghz rams

but if i cant run them at 2ghz i will cry

Is there actually any real benefit to this? I mean the RAM is astonishingly fast anyway, right? And the memory bandwidth is massive.. it's never going to be a bottleneck.

For games, number crunching, movie converting etc.. does raising the ram from 1600mhz to 2000mhz really make any difference?

 

[mudkip]

I am having some problems with my ram timings I think. I am running some 1866 OCZ platinums rated for 9-9-9-24. I have them running at 7-7-7-21, at 1.648V, and I am running 1.375V QPI. I am not able to pass LinX with them after 3 runs, although I can pass many runs of 32m Super-pi? I am about to try Memtest 86+ 2.11, any ideas? the ram is running at 800mhz now.

Super pi doesn't stress your cpu / mem at all.

Maby only for 10% but it's definitely not a stress test.

Why not try to run the mem @ 1600Mhz 7-7-7-20 with 1.66v ?

 

[phanbuey]

Is there actually any real benefit to this? I mean the RAM is astonishingly fast anyway, right? And the memory bandwidth is massive.. it's never going to be a bottleneck.

For games, number crunching, movie converting etc.. does raising the ram from 1600mhz to 2000mhz really make any difference?

nah i seen the benchmarks - barely any difference usually less than 1% in real-world apps.

 

[mudkip]

see thats a problem cos i really really want 2ghz rams

but if i cant run them at 2ghz i will cry

Well it's possible to run them with 21x200 with the mem MP on 10x and the uncore @ 20x . Maby it will be stable, maby not. Possibly you'll need to raise the QPI / QPI PLL voltage

 

[wolf]

well 2ghz is the dream but your all right, 1600 is still plenty blazing fast.

If it will definitely mean more voltage I'll stick with 1600mhz anyway, I only plan to try get my voltage lower than what it is now, not higher.

 

[Davidelmo]

Hmm, pushing my o/c to 4250mhz at 1.2750v fails Prime95 after about 1hr

Yet 4200 is totally stable.

I'll probably not push it further at this point.. maybe just see if I can work on lowering the voltage further. I don't want to hurt my chip with high voltage and high temps.. it's already running 58% faster than the rated speed at LESS than stock voltage.

RAM is at 1600mhz, 8-8-8-20, stock voltage. Again, I'll probably leave it since RAM speed isn't really adding anything to overall system performance.

And let's be honest.. this whole system is stupidly fast and it's probably not worth stressing over an extra 2-3% performance, especially since graphics card is the biggest bottleneck for gaming, and hard drive speed for load times.

 

[mudkip]

Hmm, pushing my o/c to 4250mhz at 1.2750v fails Prime95 after about 1hr

Yet 4200 is totally stable.

I'll probably not push it further at this point.. maybe just see if I can work on lowering the voltage further. I don't want to hurt my chip with high voltage and high temps.. it's already running 58% faster than the rated speed at LESS than stock voltage.

RAM is at 1600mhz, 8-8-8-20, stock voltage. Again, I'll probably leave it since RAM speed isn't really adding anything to overall system performance.

And let's be honest.. this whole system is stupidly fast and it's probably not worth stressing over an extra 2-3% performance, especially since graphics card is the biggest bottleneck for gaming, and hard drive speed for load times.

How do you know your 4200Mhz overclock is stable?

I've only read you saying that you converted some video's and doing some things but no OCCT or any other real stress test?

 

[Davidelmo]

How do you know your 4200Mhz overclock is stable?

I've only read you saying that you converted some video's and doing some things but no OCCT or any other real stress test?

I did Prime95 overnight.. about 9 hours and it was totally fine

edit: I also did Prime95 small FFT along with furmark for about 4 hours to generate maximum heat. That's basically 100% CPU usage on all cores + 100% GPU usage too.. way worse than any game, conversion or anything else would possibly inflict, right?

 

[mudkip]

Good job

 

[Jakethesnake011]

I am gonna try upping the voltage, although I dont think that a 0.02V jump would do the trick on the Dram. The UD5 has the many ram voltage options. Any insight to settings? I have them on auto for now, or should I try and up them too?

 

[mudkip]

I am gonna try upping the voltage, although I dont think that a 0.02V jump would do the trick on the Dram. The UD5 has the many ram voltage options. Any insight to settings? I have them on auto for now, or should I try and up them too?

you should try it first and ask later. but perhaps you can increase the voltage to 1.70v or maby even 1.80v

 

[Jakethesnake011]

I am trying to get my Uncore Frequency up around 4000 Mhz. So far I have been able to use a x4 memory multi and an x 18 Uncore multiplier. Now I am stable with those two in Linx. Although when I begin increasing the Uncore Ratio I lose stability. I can boot into Windows with an x19 Uncore and then no boot at x20, which would give me the 4000mhz, since at x18 I am at 3600mhz (the same as my QPI link). Now this is for my 24/7 overclock, getting my base clock past 200 and stable is a whole another battle, which I am losing fast. Anyways, in trying to Increase the Uncore to x20, which is what I want, the 4000Mhz, I have tried raising the IOH voltage to 1.2V and that did nothing, I also tried increasing the QPI link from x36 to the next ratio (x44?) and that did nothing, I also increased the QPI voltage to about 1.425V or so and nothing there. What else do I have to increase in order to get my Uncore somewhat stable at x20. I would like to keep my ram running at x4, since my timings are 7-7-7-21 there and very stable.

 

[aquax]

Try to increase your QPI/PLL voltage

 

[Black Panther]

Hey guys, which air cooler are you finding out gives best results with the i7?

 

[Wetbehindtheears]

Titan Fenrir has good results.... only found out after getting a CM V8 mind!!!

 

[PaulieG]

Hey guys, which air cooler are you finding out gives best results with the i7?

At this point, I think the TRUE gives the best performance for i7. Honestly, these chips beg for water cooling.

 

[Fitseries3]

xigmateks work nicely. i've run 4.5ghz benches with my xigy just fine. anything over that gets a bit warm. i also reccomend a good 120x38mm fan with any air cooler.

 

[Binge]

I've used a Xig Direct Touch on an i7 and gotten 4.6GHz. The idea is that these chips beg for water in a 24/7 OC. For personal comfort.