How long to run Prime95

M

Magic187

New Member

Joined

Jul 16, 2003

• Aug 7, 2003

• #1

Prime95 only runs for about an hour before crashing. Is this enough time to consider the processer stable? I dont keep my computer on 24/7 nor do i play games for over an hour straight.
I was thinking bout raising the voltage but i dont want my temps to go up.

 

G

Gautam

Senior Benchmark Addict

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Joined

Feb 4, 2003

Location

SF Bay Area

• Aug 7, 2003

• #2

You should run for at least 12 hours. If Prime95 ever crashes, though, it means that your system is unstable for sure. You should be raising your voltage.

 

XeRoFuN

Mr. Nerdlogic

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Joined

Jun 10, 2003

Location

CA

• Aug 7, 2003

• #3

Wow...1 hour is way too short. I usually run it for at least 8 hours, but the more the better.

 

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hitechjb1

Senior Member

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Joined

Feb 2, 2003

• Aug 7, 2003

• #4

At the beginning stage of overclocking for CPU and FSB, running it for a little while (5-15-30 min) should be enough to get a feeling about the general stability. If it seems to be stable, one can get to the next higher step - 0.5 multiplier higher for CPU overclocking with 0.25V Vcore increase if needed, or 1 to few MHz higher for FSB overclocking.

At the ending of overclocking when FSB is thought to within 1-3 MHz and CPU is thought to within 5 MHz from max best, it would take a much longer time (12 at least or longer as possible) to check for higher stability coverage.

Use both Prime95 and 3DMark 01/03 to check for stability. 3DMark 01/03 is good for overall system stability, including CPU, FSB, video, system drivers, ... stability.

 

Last edited: Aug 7, 2003

treepop

Member

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Joined

Mar 4, 2003

• Aug 7, 2003

• #5

I say 6 but thats just me...the way I figure there was never a time I hever ran a game or anything 6+ hours straight....without getting a sore but.........so if it crashes I take it as a sign to GET OFF MY BOOTY!....thats just me though

 

c627627

c(n*199780) Senior Member

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Joined

Feb 18, 2002

• Aug 7, 2003

• #6

treepop, I had Prime95 give me errors after 8 hours more times than I can remember. 10 hours is the bare minimum I'd say.

 

Q

Quest For Speed

Member

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Joined

Jan 29, 2003

Location

New York City

• Aug 7, 2003

• #7

To find the rough max OC for a given Vcore I run Prime95 for 1 hour. After trying different combinations and settling on a setting I run it for 72 hours for the final test. I also loop 3Dmark01 and play my favorite games.

 

treepop

Member

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Joined

Mar 4, 2003

• Aug 7, 2003

• #8

well I also have recieved errors after 9 hours....more times then not...it's due to my ac being turned off for the night or something.......there are so many outside forces in 24+ hours of testing......like your roomate starts jacken with yourcompute and doesn't say anything.....hehe......or your ac is turned off and your room gets to like 80 and your temps shoot......I dunno but 66 hours is ALOT!....so it suits me.......also I have to much to do to have no computer for 2 days UHG!....hehe...I think the current oc in my sig ran stable for 12 or so hours so I think I am cool

 

Tyranos

Member

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Joined

Jul 20, 2001

Location

OR

• Aug 7, 2003

• #9

It just depends on what you do really. Test for a bit longer than you usually sit down and use the computer for games or whatever.

 

c627627

c(n*199780) Senior Member

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Joined

Feb 18, 2002

• Aug 7, 2003

• #10

Note that you can use your computer to do whatever you want during the Prime95 torture testing period so you don't have to worry about those factors.

The idea is to test the computer stability in a given environment. If it can stand your AC being turned off at lower speeds and not higher then that's that.

 

drshivas

Sith Lord

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Joined

Jun 17, 2003

Location

Maryland, USA

• Aug 8, 2003

• #11

I run p95 between 18-24 hours. I too have gotten errors after 8 hours. And whenI can, I use it while it is runnnig the torture test. For true stability, it needs to be able to handle that.

 

grunjee

Member

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Joined

Jun 1, 2001

Location

Tri-Cities, Washington

• Aug 8, 2003

• #12

I too have seen errors after 8 hours... once even after 14 hours. My rule is, 12 hours is usually good enough, but 18 for sure.

 

jonspd

Super Speedy Senior

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Joined

Jan 18, 2003

• Aug 8, 2003

• #13

I once ran it for 72 hours just to make sure and 3dmark looping for 24 hours.

 

D

Duner

Member

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Joined

Jun 6, 2003

Location

Canada

• Aug 8, 2003

• #14

I agree one hour is too short to be considered stable. Are you sure it's the cpu that's failing. You have some pc2700 ram there running 200 FSB and that could be a problem. If upping your voltage doesn't solve your stability problem, I'd suspect the ram. You may want to try memtest to test it out.

 

J

Jen

Member

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Joined

Dec 24, 2000

• Aug 8, 2003

• #15

last time i did prime 95 i ran it for 3 days straight. 3dmark was looped for 8 hrs .


chip was a 2100+ at 2088 mhz 1.6 volts. because of room temps and that this is roommates computer i will leave processor at this speed for her use


Jen