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Misc questions about my i5-2500k overclock, any help would be awesome. - Page 3

post #21 of 23
Thread Starter 
Quote:
Originally Posted by Belial View Post

There's nothing semantic going on. CPU does CPU work. GPU does GPU work. Physics calculations, AI, that is not frame preparation work done by the CPU cores, that is CPU work that the CPU sends to the program, not to the GPU.

Yes, there is interaction between CPU and GPU - it's called PCI-E controller. There is no interaction of the cores, there is nothing based on the speed of the CPU.
When I would fail prime95 consistenly before 6 hours yet I could pass OCCT all day. I've tried every stress testing program (except havent played with xtu too much but havent been too impressed with the bit I played with it), believe me, I wish something was easier than 24 hours of prime95.

Prime95 finds instabilities quicker than any other program when you set it to the right settings. The issue is that at default, Prime95 does not stress your CPU very much, while programs like OCCT and IBT, at default, stress it a lot. You need to set priority to above normal for prime95, like it is for OCCT/IBT, as prime95's default priority is 1, the lowest possible (originally it was compute workload program, not stress test, that's why some weird settings like that). Max out the ram as well.

But at the right settings, prime95 will crash way earlier than ibt/occt, and it'll crash at 6-24 hours where IBT/OCCT simply will never crash. And IBT/OCCT stable is wayyyyy off what's really stable, I've had faulty hardware consistently pass 50+ runs of ibt and even 12 hours of prime95 but could never do up to 24 hours.

I've overclocked 5 different systems in the last year, believe me, I wish you didn't have to do 24 hours, it's a pain, but it's really the easiest and quickest way to stress test. It's up to you whether you want to listen to a well-written response or blow it off because you want to find an easier (albeit incorrect) answer. I chose for a long time to believe that 24 hours wasn't necessary either, until I had to reinstall windows because of a crash during an update, and because my new CPU was unstable at every possible overclock and I thought it was because it had 6 broken pins that I had replaced, when in reality I just had a faulty motherboard.

OCCT just reads you values from HWMonitor, which isn't that good. Use HWInfo. Trust me, if you dig graphs, you'll love hwinfo. I've pretty much replaced every single monitoring program, cpu-z, etc, with hwinfo. It's just a million times better...
I mean it's obvious you started prime95 right before you went to work, or whatever. So you test for 24 hours and 10 minutes, so what. But god forbid you simply have no idea if you started prime95 in the morning or afternoon, you could write it down (i always write down every clock, volt, and misc. setting for each test, really allows you to create a picture of your hardware as you see trends on what seems to crash more or less).

There's also the prime95 log, results.txt. Just check for when test length 448 started (search). That's the first test, so when that completes that'll tell you 15 minutes after prime95 started.
IBT doesnt get your chip nearly hot enough.

Use Small FFT prime95 (or custom small fft min/max fft length 8/8). Small fft test is what prime95 runs during the 2nd pass (minutes 15-30) of a blend test, as well.

ok all sounds good. I see what you mean now about OCCT, and I can agree with that. As for prime95, its just a pain when I wake up and it obviously crashed without me being there to see what went wrong. I guess its pretty safe to assume as well. Yeah I know too that I should be writting stuff down, thought about that before I got back on here to check responses. If IBT doesn't do such a good job, how am I getting waaaaaaaaay higher temps using that than with prime? I am guessing its due to me using the auto settings in prime fft and blend. Still have to learn how to set up the right customs, which you explained above.
Ill check out hwmonitor, i think that ive used it before. Right now I also have SIW, that isnt the same thing is it? Even in that its showing radically different temps than realtemp, so I agree with the discontinued use of that as well.
I appreciate all the patience with my endless questions.
post #22 of 23
Quote:
Originally Posted by Belial View Post

There's nothing semantic going on. CPU does CPU work. GPU does GPU work. Physics calculations, AI, that is not frame preparation work done by the CPU cores, that is CPU work that the CPU sends to the program, not to the GPU.

Yes, there is interaction between CPU and GPU - it's called PCI-E controller. There is no interaction of the cores, there is nothing based on the speed of the CPU.

I don't know why you keep persisting on this split between CPU work and GPU work. Yes, they both process different tasks, but the GPU can not start rendering the frame until the CPU delivers the data to the input queue. The GPU is not rendering stuff independently, it is rendering what the CPU is telling it to. Yes, the program and the API are controlling that flow of information, but that work is all being by the CPU and the GPU has to wait for it before it can render the frame. Where do you think the GPU gets the information it is using to draw the frame? You can argue all you like that they do different "work" (which is obvious), but the speed of the CPU can impact the performance of a modern game. Why else would anyone get a faster processer?
post #23 of 23
Thread Starter 
Ok so I like hwmonitor, its just the same as my siw but i dont have a cluster f*** of info i dont need. however, now im confused. I set my vcore to 1.310v and hwmonitor is showing:
value: 1.320
min: 1.308
max: 1.368

So is my voltages even changing when I drop a step on the vcore in the bios? Just strange that I am getting higher than my set 1.310v
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