EPTIm pretty sure your motherboard and/or CPU is just a ton better than mine, cooling too, im gonna make sure to get either an NH-D14 or if i dont have the space, a high end water cooler with my next build (ivy bridge? not even sure if there will be quads etc)
Overclocking i7 950 - Page 3
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Cyro
United Kingdom20326 Posts
Im pretty sure your motherboard and/or CPU is just a ton better than mine, cooling too, im gonna make sure to get either an NH-D14 or if i dont have the space, a high end water cooler with my next build (ivy bridge? not even sure if there will be quads etc) | ||
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Phayze
Canada2029 Posts
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Cyro
United Kingdom20326 Posts
On November 21 2011 13:23 Phayze wrote: you wouldnt happen to have all the power saving features enabled would you? None of them... Its a pretty horrible result (3.8ghz w/o hyperthreading) but i guess im stuck with it when i cant move bclck above ~170 without instant bluescreen at any voltage, nor move multiplier past 23, and hyperthreading gives me >10c more heat, which i cant really afford either | ||
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Cyro
United Kingdom20326 Posts
I think my CPU got permanantly damaged or something | ||
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mahnini
United States6862 Posts
On November 21 2011 11:34 Boblhead wrote: I consider the 1156 lynnfields to be first gen  they are part of the generation of architecture. if anythign the bloomfields came first. On November 21 2011 13:44 Cyro wrote: It bluescreened. Same bclk, mult, RAM, uncore, qpi settings as you, 1.3 vcore, qpi/vtt on auto... I was running @4 with hyperthreading for almost a year using 1.35vcore, qpi/vtt on auto... a bit hot but it never actuly passed ~80c outside of benchmarks, just doesnt work anymore. I think my CPU got permanantly damaged or something some people experience degradation with high voltage overclocks so that might be what's happening in your case. | ||
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Phayze
Canada2029 Posts
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SoulWager
United States464 Posts
Each CPU is different, if yours got damaged or not you should probably start from scratch on it's overclock: If you're new to overclocking, you should probably leave all the voltages except vcore on auto. with good 1600 memory, the RAM overclock will be limited by the IMC in the CPU, not by the ram it's self. IIRC those CPUS were only rated to run RAM at 1066. but for ease of overclocking, just load the XMP then manually override the memory multiplier down to 8. If you're aiming for a substantial OC, you should disable Hyperthreading and all the power saving features of the CPU.(HT is like adding 25% increase in performance for highly threaded environments, it generally won't help as much because you'll hit a higher cooler OC without it. It won't help at all for sc2) If you want a stock voltage OC, you can leave HT on. set vcore to 1.2v, CPU multipler to it's highest, then starting at about 150 increase BCLK in increments of 5 until you can't pass 5 minutes worth of prime. Then start incrementing vcore very slowly, until you get stability back, then BCLK till you lose stability. Repeat until you hit your maximum tolerable voltage/temp(I'd stay under 1.3v and 80°C in prime were it my machine), or you hit your desired OC, or stop when increasing voltage doesn't improve stability. Now you have your highest 5minute stable CPU overclock at that multiplier, try reducing CPU multiplier by 1, and increasing BCLK by about 10-15, to see if you can get a higher stable overclock with that multiplier. after you make that call, you pick your multiplier and start fine tuning the stability: drop BCLK by about 5 from the highest 5 minute OC, run prime for a couple hours to see if it's stable, then repeat the above process with smaller increments and 1 hour stress tests to narrow down the ideal settings. When you think you're done, run a 24 hour torture test to make absolutely sure it's stable. as for me, I have an i7 930 @ 3.61Ghz, 1.175v w/ HT on. I didn't bother with a huge overclock because it's fast enough to stream sc2 at stock voltages, and I prefer a cooler running CPU(less heat= less noise, and yes my CPU is slightly undervolted). | ||
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Cyro
United Kingdom20326 Posts
On November 21 2011 16:08 Phayze wrote: Yep, your friend was quite stupid to have you running that processor at 1.35V for a 4ghz OC on a d0. Look up your motherboard online and see what OC's other people achieved. It could be a limitation of the board just not being able to handle the higher bclk. So at like 1.24V Vcore and 1.22 QPI/VTT is instant BSOD at 166 BCLK? It could be a case of TOO much power. Like remember, stock i7-950 is 1.181V. Google the BSOD code. You want to look whether it's caused by memory or the OC (power related/failure). I tried stock vcore @166x20 mult and it wouldnt boot either with other stuff on auto. The RAM has like 20 reviews from people stating they hit 4ghz+ with it with no problems on the same cpu's. Thanks for all comments, il have another whack at it later | ||
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Cyro
United Kingdom20326 Posts
What should i do from now? Can i push it further, is it a problem with motherboard/cpu etc, am i maybe missing a setting etc, or just stuck @3.6ghz? Heat is fine, 80c @1.3v with hyperthreading when i tested it at that an hour ago. Thanks for all your help everyone either way. Im looking a lot more into vtt voltage and running memtest as that seems to be a potential problem | ||
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Cyro
United Kingdom20326 Posts
More knowledge of what runs and what doesnt cant hurt right? | ||
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Phayze
Canada2029 Posts
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Cyro
United Kingdom20326 Posts
On November 22 2011 09:59 Phayze wrote: You should not have any trouble as long as you are careful with how much power you pump into the processor. If theres not enough power, it blue screens, you reset cmos, no harm done. Too much power, cause damage, then you have problems. Experiment all you want with different multipliers/bclk combinations but try to stick to multiples that keep your ram at it's rated speed. Yea ive always been watching RAM frequency etc, manually set it to 1.6v 9-9-9-24 and favoring going under the rated 1600mhz instead of OCing it using the mult. Interestingly enough, it seems i need >1.26vcore to boot at higher base clocks, even on lower overall frequencies... 200 instant crashes regardless, but 180x22 @1.31v seems pretty stable (166x(>20) is not) so im gonna keep testing for a bit. On a side note, when do i evolve into a reaver? | ||
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Cyro
United Kingdom20326 Posts
Im at 3960mhz (180x22) 1.31v with RAM underclocked to 1440mhz, floating 74-80c across cores, should i bump up the vcore a bit? | ||
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Cyro
United Kingdom20326 Posts
Hyperthreading cuts 10c off those temps, so i was considering running Prime95 with it disabled at the same voltage, would that be an accurate test of stability though? Im not sure what effect disabling hyperthreading would have on potential errors (would they not occur with the reduced load/heat?) but if you think i should il run it for like 8 hours or something. It took me 2 hours to get a second thread to crash @1.3v with error (after i couldnt even run at 1.28) so i think 1.35 should be stable, provided temps are not an issue (and i havnt found anything capable of driving them nearly as high as p95) | ||
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SoulWager
United States464 Posts
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Cyro
United Kingdom20326 Posts
On November 22 2011 15:51 SoulWager wrote: Why do you have hyperthreading enabled in the first place? If you're increasing voltages to get a better OC, that should be disabled regardless of what programs you're running. It sounds like you wasted a lot of time with the trial and error method. While the systematic approach in my earlier post might take a couple days of work to find the limit of stability, you're going to get better results. Because i dont loose anything by enabling it as far as i know. I wasnt going to use it for xsplit/sc2/skyrim anyway, actuly disabled atm. I cant run at lower voltages anyway, because the system is unstable. 1.3v gets me some 3.4-3.5ghz, anything less will throw up prime95 errors or flat out bluescreens. I tried your approach, but i cant get anywhere near 4ghz with it, HT on or off. It might be a problem with my motherboard (or just a shitty motherboard) or i might be missing something, but i cant get anywhere on the lower voltages mentioned. 166x23 on 1.26v instant crashes in p95, ~1.3v throws up errors, and this is 3.84ghz without hyperthreading. My 1600mhz RAM is @ 1440mhz at rated timings and voltage meanwhile, and i tried various uncore multiplier settings but it had zero effect on stability | ||
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SoulWager
United States464 Posts
for further reading: http://www.overclock.net/t/538439/guide-to-overclocking-the-core-i7-920-or-930-to-4-0ghz That guide works just as well for an i7 950, you just have the option of higher multipliers. | ||
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necrosed
Brazil885 Posts
I'm shooting for 4GHz. I also have a trio of Kingston's HyperX Ti 1800, so I'm gonna ask for some early advice on what should I tweak to get the maximum from it. (as you can see, I'm not very experienced). Are memory timings > memory frequence? What should I shoot for? btw, My heatsink is a ThermalTake SpinQ VT. | ||
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Phayze
Canada2029 Posts
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SoulWager
United States464 Posts
On November 22 2011 20:52 necrosed wrote: Well, I just got my D0 950 recently, but haven't got the time to overclock it (I'll do it in two weeks or so). I'm shooting for 4GHz. I also have a trio of Kingston's HyperX Ti 1800, so I'm gonna ask for some early advice on what should I tweak to get the maximum from it. (as you can see, I'm not very experienced). Are memory timings > memory frequence? What should I shoot for? btw, My heatsink is a ThermalTake SpinQ VT. http://www.overclock.net/t/538439/guide-to-overclocking-the-core-i7-920-or-930-to-4-0ghz That guide will work just as well for a 950, as for memory, you won't notice a difference in performance outside of huge spreadsheets or other niche applications so it probably isn't worth the time to optimize. as for timings vs clock, that depends on how much more clock you get from loosening the timings and the reverse. Considering the CPU isn't going to like running memory that fast, you're better off optimizing for latency. If you really want to optimize your RAM, try 7-8-7-24 @ ~1400 and work your way up. | ||
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