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post #41 of 57
Quote:
Originally Posted by danimal View Post

correct me if im wrong, but what those videos tells you? big nothing...
in both videos calculation is done, we dont know on what RPMs are fan running but I guess its full speed. We dont know if both of them were cooling CPU only with SA or additional fans, but what we know from first video, he idles at 67-70C (one core is for moment 83C), so I guess in 100 load you just cant cool it with air...(or SA+some high RPMs fans)
this is just pure promotion video from thermalright
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post #42 of 57
Thread Starter 
Quote:
Originally Posted by kremtok View Post
That looks like you're doing really well. You should be able to complete all of the Small FFT tests with no errors, freezes, or BSOD. Once you do this, then it's time to move on to the Prime 95 Blend Test. This one takes a bit longer; there is some debate about what is acceptable, but most folks argue that between 8 and 24 hours of continuous testing is necessary to ensure absolute stability. Personally, I use 24 hours as the standard, but you should do your own research and decide based on that.

Keep your RAM where it is for now. When you start the Blend test, you're bringing the memory and memory controller into the equation. That's why we made sure that the CPU was 100% stable first. Expect that you will have to start playing with PLL, VTT, and IOH voltages when you run the blend test.

Your temperatures look all right, considering your very high ambient temperature. Just keep an eye on things and don't go much above where you are now. My i7 950 maxes out near 85C at over 1.4v, and even I think that's way too hot. It looks like you've got a good overclocker on your hands, though, so enjoy it!
What are the acceptable temps for load on prime95? or considered good temps on load prime95?


Okay, I've run Blend tests for 15min no errors or BSOD,
I want to run blendtest overnight with no errors, I will put on overheat protection from coretemp on (PC shuts down when CPU hits 80C)

Can I CPU run @ 75C for 8hours? wouldnt that damage it?

If the PC finishes SmallFFTs do I know that the CPU is stable? it passed 15min Blend, well I stopped it @ 15min and had to do something else

With regards to: PLL, VTT, and IOH voltages do I only tweak them if Blend test fails?
or do I tweak them to get less heat on RAM or CPU?

Also, Can I switch speedstep on? it will probably lower my idle temps
idle at the moment: 40C CPU @4Ghz Vcore:1.288V

Can I leave turbo mode off permanently?

Sorry alot of questions here
post #43 of 57
80C is regarded by many as the max safe 24/7 temperature for a 45nm LGA 1366 processor, so you're good there. There is some debate, but it's a decent rule.

Yes, if the Small FFT test completes all FFT lengths, then you know your CPU is stable. For Blend, it should do a minimum of 8 hours with around 24 hours being ideal. 'How stable' is another frequently contended point. You can test the memory independently, as well, but it doesn't look like you're having RAM problems now so there's no need to waste time on it in my opinion. MemTest86+ is the program to use, for the record.

Which voltage to tweak depends on what kind of error or BSOD you get. I've got a good guide on my home computer that I'll link you to in a few hours. At this point, they should all be lower than you need them to be for stability, but that's fine. The point is to run the test, see what fails, change a value, then observe the effects during a follow-up test. From here, however, your temperatures are going nowhere but up, but probably won't change by much. CPU VCore has the largest effect on temperatures and the others are negligible.

SpeedStep has been observed by some to create random instability problems. I recommend that you keep it off, at a minimum until you are finished with all of your stress testing.

Good luck!
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post #44 of 57
Quote:
Originally Posted by hawkeeyee View Post
correct me if im wrong, but what those videos tells you? big nothing...
your post was a boatload of idle speculation, and you totally missed the point... which is o.k., the o.p. understood.

since you insisted on going off-topic... i tend to think that a "world record" can't be that until it gets recognized by a sanctioning body, using established rules.
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post #45 of 57
Quote:
Originally Posted by lem_ View Post
Okay, I've run Blend tests for 15min no errors or BSOD,
I want to run blendtest overnight with no errors, I will put on overheat protection from coretemp on (PC shuts down when CPU hits 80C)
what is your intended useage? bench queen or real-world useage?

if you aren't going to be folding, running overnight render jobs, etc., there is little point in running the cpu at max throttle for days on end.

what matters is application stability... application software can crash a prime95-stable pc in a heartbeat, so do your final testing with the software you'll be using.

for instance, i do a lot of hi-def video editing and rendering; i've seen 8 hours of prime 95-stable configuration crash when scrubbing the timeline.
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post #46 of 57
Quote:
Originally Posted by danimal View Post
what is your intended useage? bench queen or real-world useage?

if you aren't going to be folding, running overnight render jobs, etc., there is little point in running the cpu at max throttle for days on end.

what matters is application stability... application software can crash a prime95-stable pc in a heartbeat, so do your final testing with the software you'll be using.

for instance, i do a lot of hi-def video editing and rendering; i've seen 8 hours of prime 95-stable configuration crash when scrubbing the timeline.
Your last point is precisely why I and others a silly as I am advocate for a 24-hour Prime95 Blend test to verify stability. The alternative is setting a custom test to check every FFT length, but though that's more likely to catch any error, it's less realistic.

For the record, I've experienced similar problems with Folding@Home: My dedicated folding rig has crashed under the load of the Folding@Home application, requiring a core voltage increase twice over what was 24-hour Prime95 stable. However, if all that lem_ is going to do is game and some light computing applications, 24 hours of Prime95 Blend is more than enough to show complete stability. Remember that every computer will fail Prime95 eventually, whether it takes less than a minute or over a century.

In short, I agree with you: Practice how you play, but use Prime95 first.
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post #47 of 57
Thread Starter 
I see now why they probably used 1.4V, it's more stable, and they didnt know what I intended to do with the PC, ironicly when I first booted it said "Overclocking Failed" on startup BIOS screen and had to restart twice to boot to windows, so don't like the job they did at all.

I see on all overclocking tutorials that people recommend vcore under 1.25V for 4Ghz, mine is not stable @ 1.26V @4Ghz, are i7 950 just not that good at overclocking or is it my Motherboard?

I just game with my PC and occasionally Bench but just for fun to see what I score, not much of a bench queen

So my CPU will hit 62C max (thats on SC2 and Black Ops) other games CPU gets to 54C max. This is with the 4Ghz Oc now, those temps are fine right?
Edited by lem_ - 12/28/10 at 11:52am
post #48 of 57
I would say you're fine. I did a lazy OC and just set my multiplier to 21 and BLCK to 181. From there I just manually adjusted my Ram Voltage to 1.64 and Cpu Voltage to 1.23 and left everything else AUTO. My temps get to about 73C after 2 hours Prime Blend. I'm totally fine with that because on BFBC2 and BO my temp barely reaches 60C and that's what you are really looking for, temperature and stability under normal use.
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post #49 of 57
Thread Starter 
Quote:
Originally Posted by Stupidhatmatt View Post
I would say you're fine. I did a lazy OC and just set my multiplier to 21 and BLCK to 181. From there I just manually adjusted my Ram Voltage to 1.64 and Cpu Voltage to 1.23 and left everything else AUTO. My temps get to about 73C after 2 hours Prime Blend. I'm totally fine with that because on BFBC2 and BO my temp barely reaches 60C and that's what you are really looking for, temperature and stability under normal use.
I like your rig! pretty Monsterous 2x 580 ...nice
post #50 of 57
Quote:
Originally Posted by lem_ View Post
I like your rig! pretty Monsterous 2x 580 ...nice
Thanks man, I'm looking into a 980x and new Mobo right now and I'm not sure why... the 580's are really great though.
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