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Haswell Overclocking Guide [With Statistics] - Page 640

post #6391 of 19652
Quote:
Originally Posted by Unknownm View Post

The cpu has to be stable in all test Period!. Chances are I would never push my cpu to those extreme limits but who the heck knows?

If the OC can handle 90c cpu load from LinX, i'm already in the right direction to a stable overclock. Since some CPU fail after higher temps even if they are stable at lower.

It does not have to be stable in all tests. That's just stupid. I am never going to use AVX2 applications, so does that mean I need to be Prime 28.1 stable? Nope. I'll be just fine with x264 and my gaming/encoding.
post #6392 of 19652
Thread Starter 

But Linpack is a new order of magnitude ABOVE Prime. And Prime was already hardcore synthetic beyond what we'll ever use. IIRC the way Linpack with AVX works, the stress is way above what any actual AVX workload will ever accomplish. In fact, a normal AVX2 workload won't be out of the ordinary in temperatures from any other normal computer workload. I can see why some people prefer Prime, maybe OCCT or something on top of x264, but Linpack is just overkill and not a requirement to be on my chart.

 

And if you're ever bsoding "too much", all you gotta do is lower the multiplier by one, and boom, instant rock solid stability.

 

I mean, how stable is stable enough? What if I made a new program that dwarfs Linpack and makes that look like child's play? Then by the seemingly arbitrary definition of 'stability', that is, 'passing all the tests the programmers at the time decided to make', it's impossible to ever be stable, even at stock.

 

I understand you might change your position (or it might have been your position all along) so that, while others don't need that 24/7 reliability, you do. That's fine, but for the sake of writing a guide for the general audience, I have to consider everybody. And stating absolutes is something I try to avoid. I know you didn't ask but I'm just stating how I deal with issues of stability. I'm not going to suggest to others or for my own use, lower my OC for a new, completely unforseen application that will drive my temperatures up beyond what any other real world application is capable of. Because then we can continue this forever: What if there's a new app that's even worse than the first? Then we might as well never OC.


Edited by Darkwizzie - 12/2/13 at 11:45pm
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post #6393 of 19652
Quote:
Originally Posted by Unknownm View Post

The cpu has to be stable in all test Period!. Chances are I would never push my cpu to those extreme limits but who the heck knows?

For how long? What you are essentially saying is that you should be running Prime 24/7 forever, because otherwise how will you know if it is really stable? At some point, which varies for each individual, it is stable enough. For most, that is x264 encoding, because that is the hardest thing they will ever actually do with their computer. And if by chance it fails later at some other application, then worry about passing that application when the time comes. I bought my computer to use, not to stress test.
post #6394 of 19652
Quote:
Originally Posted by Forceman View Post


For how long? What you are essentially saying is that you should be running Prime 24/7 forever, because otherwise how will you know if it is really stable? At some point, which varies for each individual, it is stable enough. For most, that is x264 encoding, because that is the hardest thing they will ever actually do with their computer. And if by chance it fails later at some other application, then worry about passing that application when the time comes. I bought my computer to use, not to stress test.


7 years.

 

Then your computer will have spent enough time incubating to become the true hero of time.

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post #6395 of 19652
Quote:
Originally Posted by Menphisto View Post

Clock watchdog= vccin or vring ?????

What are your settings?

Probably VRIN (vccin) but not neccesarily
Quote:
That's just stupid. I am never going to use AVX2 applications

That's the thing, x264 is an avx2 application. It's just a problem of synthetic use of AVX vs actual real world uses. If you could encode entirely using AVX, then Haswell would be twice as fast as Ivy Bridge and like five times faster than the first gen i7's, but it's not and that's not really the case at all. I've heard 5% performance gain quoted for avx2 from an x264 developer, but not tested it heavily
Edited by Cyro999 - 12/3/13 at 3:56am
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post #6396 of 19652
Thread Starter 

Hmm... Skyrim with more NPC (mods)... Glad to see the CPU can keep up for the large majority while overclocked. Probably won't be as happy if I didn't overclock it. :drink:

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post #6397 of 19652
Haswell is AVX 2, just use the up to date torture softwares. Google LinX 0.6.5 with Linpack 11.1.1 librarie and do that 200 ++ GFlops..

Anything else is good for your Sandy Bridge CPU.

Make your choice : be in the locomotive or in the wagon.

A lot of people explain you why they stick with old softwares, pretexting whatever reasons to whom want to heard.

Fact, just some excuses because their CPU can't handle a nice bulletproof AVX 2 overclocking.


Just my two cents.
post #6398 of 19652
My CPU can handle any program that uses avx2 to do anything remotely useful when it's at max overclock - so far that's basically x264, and not much else.
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post #6399 of 19652
Ok so two more questions for you pros.

I know high temps and voltage will degrade the cpu faster. I'm assuming 60c temp ceiling at 100% load is fine. But at what voltage does cpu degradation become an issue? What time frame are we talking in terms of how fast high voltage will degrade a chip? And will adaptive voltage help minimize this?

Second question, I will be adding a videocard. I won't be using Lucid Virtu MVP. Should I disable the HD4600?
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post #6400 of 19652
How long's a piece of string? Don't think anyone knows the answer to that yet with regards to Haswell. Running adaptive/power saving will definitely help so it's not under 100% load constantly.

BIOS will probably automatically disable the iGPU when you add a GPU. If not it's easy enough to disable.
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