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[Official] Delidded Club / Guide - Page 1305

post #13041 of 33558
ibt maximum stress for me,then ill play lots games to find any instability,prime95 is a bit weak imo

but each to there own n all that
post #13042 of 33558
Quote:
Originally Posted by invincible20xx View Post

how to set prime to test blend with 90% ram like you guys suggest ? i have 8 gigs of ram
Do a Prime95 Torture test, click Custom, leave all defaults except for the memory used. Look at the performance tab of Task Manger and use 90% of the Available number. Let it run for 24 hours. Check to make sure you have nothing popping up in your Event Viewer - Custom Views - Administrative events.
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post #13043 of 33558
Quote:
Originally Posted by wazza300 View Post

ibt maximum stress for me,then ill play lots games to find any instability,prime95 is a bit weak imo

but each to there own n all that
I have tried many oc settings that passed IBT with zero issues, and failed in Prime95. I have little use for IBT except to test temps, but like you said, to each his own.

I think we all agree that 24 hours of Prime95 is just step one, you have to do everything you normally do for a little while to see if it is stable for you.
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post #13044 of 33558
Thread Starter 
Quote:
Originally Posted by invincible20xx View Post

thanks for your input belial but i know i need to test for 24 hour + , i did small ftt for 30 hours and it passed i called it a day but now you guys telling me i need to run other tests , that's what pisses me off i thought i were safe....biggrin.gif
and did it break, degrade or show instability after those 200 days ?

by the way i mine with my gpu and sometimes it crashes when the cpu is not stable

it did once i killed it... read back a few pages lol tongue.gif
post #13045 of 33558
Quote:
Originally Posted by justanoldman View Post

I have tried many oc settings that passed IBT with zero issues, and failed in Prime95. I have little use for IBT except to test temps, but like you said, to each his own.

I think we all agree that 24 hours of Prime95 is just step one, you have to do everything you normally do for a little while to see if it is stable for you.

that's true,but ibt is very fast at finding instability compared to prime95

your pretty close if your ibt stable,gaming/day to day usage will find the rest
post #13046 of 33558
Actually each of those stability tests focus on one or more parts of the cpu and how it works. I'm not exactly sure how or on what, but I remember reading about it in some anandtech forum thread VonDutch posted here.
I favor a more functional approach to stability testing. Test according to your needs, but test smart. Find out what is it that your chip works on when doing your task of choice and then test with programs that use that, or just do the darn thing biggrin.gif
post #13047 of 33558
All I do is game. I'm fine with 15 passes of IBT max mem, then 2-3 hours of P95 and I'm good.

I'm just really lazy tongue.gif
post #13048 of 33558
12hrs minimum p95 blend test 90% ram. thats how i roll. all this overclocking talk makes me want to try for 5.2 ghz prime95 run biggrin.gif



EDIT: ok i lied about 5.2ghz i cant do it 1.55v is to high worriedsmiley.gif
Edited by lilchronic - 3/3/13 at 6:55pm
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post #13049 of 33558
Quote:
thanks for your input belial but i know i need to test for 24 hour + , i did small ftt for 30 hours and it passed i called it a day but now you guys telling me i need to run other tests , that's what pisses me off i thought i were safe....

I dont know where you got the idea that small fft would be all you need o_o

small fft is one single test of 80+ that blend does. 30 minutes of small fft is probably the same as 24 hours.
Quote:
ibt maximum stress for me,then ill play lots games to find any instability,prime95 is a bit weak imo

but each to there own n all that

I've been able to do 50 passes of ibt on faulty hardware more than once, i dont trust ibt at all. it doesnt get temps nearly as high as small fft, which is the 2nd test blend does.

People think prime95 is weak but that's because they aren't running the settings correctly. On default settings, prime95 is weaker than any other stress test program. You have:

- Raise priority to 10 (or above normal in task manager). On default prime95 is 1, which is very very low, because it was originally created for compute workload instead of stress testing. OCCT, IBT, etc, they all run a default priority of 7-10, which makes them much more stressful at default settings.

- Check off sum input and round error checking, otherwise unstable and incorrect results aren't reported and what could have just been failing every pass seems like it's stable.

- Use 80%+ ram, to stress the imc and ram. IBT on default does this to a high level while on default blend, prime95 tests as if you only have 2GB of ram on a 32bit OS.

If all you do is a game that isn't very intensive, and you don't mind having to reinstall windows in 1-3 years, or random crashes, that's fine. Personally, I don't want to be pulling my hair out in 2 years when, say, i get new ram that's failing 24 hours of prime95, when it turns out that the overclock i had been running wasnt stable and i spend weeks trying to figure out why the new ram doesn't work, or whatever, or why a certain game doesnt work at all.

I also stream, which is extremely CPU intensive. Games won't stress your system, but streaming will, and if you got a good system, imo, there's no reason not to stream every game you play (so you have it on video, get a following if you are good enough, whatever). If you have an unstable system, and i've had systems that could pass 12 hours of prime95 just fine crash quickly in streaming, you are going to crash during streaming, you are going to have stuttering and dropped frames, and you will crash during streaming (and viewers aren't keen on a stream that crashes...).

Just running 24 hours prime95 custom blend testing is the fastest and easiest way to stress test. The majority of my broken hardware could pass 12 hours but would not pass up to 24. Just the last 2 days, I set ram overclocks that could pass IBT and would only fail P95 after 16 hours.

It doesn't matter if your system fails in 16 hours or 50 passes of IBT or fails in 5 minutes, unstable is unstable. Failing only after 20 hours of prime95 doesn't necessarily mean your system is more stable, it just means a particulary segment of your system that is tested on that particular FFT length is what reveals the instability. It's not that a game won't stress your system like 20 hours of prime95. If it fails, it fails, as you are really supposed to pass infinite prime95 testing, 24 hours is just the minimum to run every test. I've had overclocks that could pass up to 21 hours of prime95 that would crash every time I opened starcraft.

Also had an issue where I had to reinstall windows because a system crashed during a windows update installation. It had ran fine for about a month, and it passed 50 runs of IBT and over 6 hours of prime95. I thought that would be enough for a gaming system, but it wasn't.
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post #13050 of 33558
Quote:
Originally Posted by Valgaur View Post

it did once i killed it... read back a few pages lol tongue.gif

On Systems Stability Testing

biggrin.gifbiggrin.gifbiggrin.gif ...this is one of those topics which gets a lot of heated discussions going...enough to make me puke (though that may also be the penicillin I'm on). So I will try to enlighten you ( biggrin.gif )...I start with a quote from Tom's Hardware re Intel's Extreme Tuning Utility, with Anandtech also having some great quotes on it:

"...XTU is likely intended for “in the know” overclocking exhibitionists and members of the press who usually get their hardware long before our round-ups are published. Most end-users are forced to search for it, and the lack of references to the name makes that search even more difficult.

Intel has its own stress-testing program, which many professional-level overclockers use to prove that their systems are stable...."


...not that I know everything, but I head the firm that has been for over a decade now supplying a very large global organization with tens of millions of members with custom software (think cloud computing and such) running exclusively on hardware we also put together. Obviously, the commercial systems are not overclocked, but we apply the same rigor to those as I do to my own systems which run and bench up to 5.3 GHz...sorry for this piece of chest-beating but I think it is necessary in this context.

- IBT ...what you folks call the Intel Burn Test (IBT) is actually not the current IBT at all - the one I see here is an older one modified by 'agentGOD' - that should have been your first clue biggrin.gif

- Prime95 isn't getting any younger - I know modern systems that can pass 24 hrs or longer on Prime95 but bomb as soon as they are supposed to run Cinebench 11.5 etc.

- I rather run 10 min of vCore at 1.75, and would purchase such a chip, but would not do so from someone who constantly runs Prime95, IBT or folds all day and all night - that will cause more degradation than short bursts of higher voltage - as much as you really should stay below 1.52v unless you have below-ambient cooling solutions

- we use specialty proprietary commercial software that is designed to bring any commercial system down in less than 2 min to test out...the stuff I see mentioned here as 'tough' and the 'final judge' of your system's stability does not compare.

- asking a CPU IMC to run 12 hrs of Prime95 on 4 or 8 GB is NOT the same as doing so on 16 or 32 GB, think of the extra work the IMC has to do...thus the CPU vCore voltages will be different - so no sense saying, 'my Golden chip' does this or that without any extra info on what is running.

- While I am at it, please stop talking about 'Golden Chips' - it usually embarrasses you, in public. There are professional OC networks where you can buy such chips...one recent one offered booted up at over 5.5 GHZ w/1.55 vCore (un-deliided) - but the asking price was $1500...that probably qualifies as a Golden Chip

Now then, back to 'XTU'...that includes Intel's current System Stability Test...it comes with a CPU stress test AND a memory stress test which you can run from 1 min to band.gif 30 days ! That's what professional overclockers use as much as commercial system builders, not to mention Anandtech , Tom's Hardware etc...when I take an Intel product such as an I7 3770K, I feel more comfortable with Intel's latest 'official' stress test embedded in XTU than whatever some folks here seem to insist on with a certain degree of zealousness...usually when someone just posted a faster CPU time than they did.

My recommendation should be clear: Run Intel's XTU stress tests for CPU and memory for 12 to 24 hrs - and have a nice day thumb.gifthumb.gif
Edited by Joa3d43 - 3/4/13 at 9:55am
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