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Define: Stable

post #1 of 10
Thread Starter 
I was just on Prime95 for a couple hours, my CPU is clocked at 4.0Ghz. I've been noticing that my case really sucks for airflow (I'm getting a new one soon) and I wanted to see how it's affecting my temps. After about four hours I go up to 63* max, usually around 61 - 62. This was the In Place Large FFTs test.

In my eyes 63 is kinda high, but then I thought, what is really stable. Because when is it that you are using 100% on four threads for four - twelve hours straight? I do a lot of video editing and 3D modeling with programs like After Effects and Cinema 4D and my temps rarely rise above 50 in those applications, and I work for long periods at a time.
Games for example, I'm usually in the 44-48 area, even with games like Crysis (not 2, thats unplayable because of the stupid crossfire bug)

So I have some questions:
(Please note, I'm talking about gamers, not servers, workstations, FAH rigs, etc.)
1. Why has the bar for stable been raised so high?
2. What would you say defines stable?
3. Is statability limiting your OC'ing? (Are you not pushing further because your prime95 results were a bit shaky?)
    
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post #2 of 10
The limit on Phenom chips is 62c anything past that could harm your cpu. Just an FYI.

When testing with P95 you'll get an error after 8 hours. Some say 3hours is fine others say 24 hours. I personally say 10 hours is good enough.

There is no point of having a high clocked cpu if itll crash at idle or playing a game.

When i test stability, I run P95, itunes and open about 5 web pages.

Hope it helps a little.
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post #3 of 10
I suppose asking for the definition of stable is like asking how long a piece of string is really. Everyone will have different ideas on how long to run a Prime test for. I like to run Prime for a few hours to get a rough idea of stability and then simply keep an eye on the system during my daily use for the next little while. Has worked well so far.
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post #4 of 10
Fold for a month, then you are stable.
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post #5 of 10
I test for stability by running Prime most of the day till i get home (12-14 hours) for 2 or 3 days then just use it normally and see if i get any weird crashes.
    
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post #6 of 10
Thread Starter 
Quote:
Originally Posted by mastical View Post
The limit on Phenom chips is 62c anything past that could harm your cpu. Just an FYI.
Wow, never knew that, I always thought it was 70. Thanks for the heads up.

I never really come close to 62 unless I'm running P95, but when I'm gaming or doing really anything else I'm fine.

I think my case has no airflow which is the problem.
Basically no intake and 1 outake spot that I have to fans attached to each other on. I'm using air cooling so I bet if I upgrade to a case like the Haf X or Antec 1200 I'll get lower temps.
    
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post #7 of 10
The term stable is relevant.

I define stable as: prime 95 for like a few hours.

Multi-hour gaming session.

No bluescreens for like a week.
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post #8 of 10
Thread Starter 
Quote:
Originally Posted by tombom View Post
No bluescreens for like a week.
A week?!? How many BSODs do you get? I tend to avoid them for months/years at a time, and when they do come I'm excited because I changed the color of my BSODs.

I actually had one today, but that was because of a driver problem, I fixed it though.
    
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post #9 of 10
Quote:
2. What would you say defines stable?
Stable means it can always be depended on. Never failing and never crashing.

Acceptable levels of stability vary person to person, and "true" stability can never be reached as it will eventually fail/die.

Quote:
1. Why has the bar for stable been raised so high?
Technically it hasn't. Even the more extreme 24h+ prime + other tests school of thought is very very little assurance of true stability.

However the 2-3h p95 "stable" crowd is so little it's scary (to me).

Quote:
3. Is statability limiting your OC'ing? (Are you not pushing further because your prime95 results were a bit shaky?)
I can boost my graphics card by over 100 core but in some games it will crash in a few hours. Even only 20-30 core it will crash eventually. So I run stock and don't crash at all. The lost saves/time the causes crash isn't worth it.
AMD, I give up.
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AMD, I give up.
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post #10 of 10
As most people say, stable is somewhat subjective, so I'll try to answer the other questions:

Quote:
1. Why has the bar for stable been raised so high?
Stability can be misleading. A PC can run and not BSOD for months, but still be unstable. How? Because the errors you get might be tiny enough that the PC corrects for them in the background, and so nothing crashes, or at least nothing visibly crashes. But small errors can begin to accumulate. Many around here reformat and reinstall so often that they never notice these errors because they never accumulate long enough to become an issue.

Anyway, the bar is set so high, because by stressing the machine so hard will create a better chance of getting an error that is noticable.

Quote:
2. What would you say defines stable?
When I used Prime 95, anything less than 24 hours was unacceptable. (That was also the prevailing recommendation on the internet) Now I use IBT for about 20 passes (which is more than enough, and twice what is recommended). And before people start saying that 24 hours of Prime95 is too much, I've had systems crash at hour 22, so it does help to run it that long. For memory testing, Memtest for about 6 hours is my usual run, although I haven't messed with memory timings too much in a few years.

Quote:
3. Is statability limiting your OC'ing? (Are you not pushing further because your prime95 results were a bit shaky?)
No. Voltage was my main concern. I've found it hard to get my CPU past 3.2 without a massive voltage increase, and I did not feel comfortable running my system at that high of a voltage 24/7. I never even got as far as Prime testing because of that.
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