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is it bad to run prime95 as soon as you start your computer ? or it dosen't make a difference ?

post #1 of 9
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my current build is listed below . today I ran prime 95 100% load test as soon as I started my computer and I noticed my temps were 2c lower . is it bad to put your computer under 100% load with out letting it warm up a little ? or it doesn't make a difference ?
    
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post #2 of 9
I think its a good idea no matter what. The hardware needs to be stressed under all circumstances.
post #3 of 9
Thread Starter 
Quote:
Originally Posted by csl110 View Post

I think its a good idea no matter what. The hardware needs to be stressed under all circumstances.
thanks that's a relief .
    
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post #4 of 9
Quote:
Originally Posted by orndorf77 View Post

my current build is listed below . today I ran prime 95 100% load test as soon as I started my computer and I noticed my temps were 2c lower . is it bad to put your computer under 100% load with out letting it warm up a little ? or it doesn't make a difference ?

Without letting it "warm up a little?". Sorry, dont mean to be rude; but who told you that a computer "needs to warm up" ? Thats probably the funniest thing ive heard all day. rolleyes.gif

Your temps being lower is normal. Happens on a cold boot. When you start stressing and benching the ambient temperature may go up unless your room is constantly getting new air flow. But on a cold boot, your ambient temperatures are probably not at your highest possbile (when your computer is on) -- thus you get 2C less on load.

CPU's nowadays have built in thermal protection that protects the PC from getting too hot by shutting itself down before any damage can happen.

Your CPU can take 100% load anytime; its designed to do that. Nothing needs to be "warmed up".
post #5 of 9
It makes no difference whatsoever. Computer hardware being almost entirely electrical means they are ready to go and don't physically need to warm up or prepare at all. Windows/drivers/software might be a little more active for the first 30 seconds or so after boot as they get everything in place. There is no need to do anything differently because of this though..

Test away! biggrin.gif
post #6 of 9
I think csl110 was being sarcastic about stressing your hardware all the time. but 2 degrees is well within the margin of error, and can just as easily be chalked up to your room being slightly colder than normal. However, I don't think you could damage the hardware as all the safeguards for overheating and the like that exist will be powered on by the BIOS.
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post #7 of 9
How weird it may sound, I encountered some cold boot problems with a power supply once.
Had a Corsair 850W PSU which couldn't hold load when it was cold.
System would just start "floating" while running 3DMark. It didn't shut down but also didn't keep running.
After letting the PSU warm up half an hour it ran without any problems.

We used a multimeter and saw the voltage rails were having difficulties when it was 'cold'.
Probably due to defective spools.
Took me a while to figure it out .. but yes it really was the PSU!

Same thing with a car engine, don't floor it with a cold engine.
post #8 of 9
Colder is better for most electronics (exceptions would be things like LCD screens). Fluke behaviors that require higher temps to work correctly are generally caused by malfunction/defect where the heat causes something to expand and establish a tighter connection. Under normal conditions, colder = lower resistance.

A CPU isn't like an engine or a human that needs to "Warm up" before hard exercise. Doesn't work that way. In fact, the best preparation to work a CPU harder is to get it colder. 8ghz happens under LN2, and usually only after letting things get as cold as possible before trying.
     
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post #9 of 9
Quote:
Originally Posted by orndorf77 View Post

my current build is listed below . today I ran prime 95 100% load test as soon as I started my computer and I noticed my temps were 2c lower . is it bad to put your computer under 100% load with out letting it warm up a little ? or it doesn't make a difference ?

Likely it runs cooler because there are some background processes still running that are not high load. As these processes get cycles to run, they will not produce as much load, though it will still show as 100%.
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