What makes you hotest?

waynebike · Jan 26, 2004

Which stress-testing program gets you the hottest temps?

I have used the following programs:
Prime95-48C
Seti@home-45C
CPU Burn-51C
Sisoft Sandra-49C

Just wanted to see what program most people use when they say their max load temps. I ran all tests for about 3-4 hours each.

Btw my board reads temps from CPU diode.

mjmnam · Jan 26, 2004

Toast

Valk · Jan 26, 2004

I Dont know if this is really fair. 100% load is 100% load. the only reason that any of those programs would not generate the same temperature is if they let off the cpu on occasion. ie, sandra when it loads tests and records the data.
If you cpu reaches 100% of its capacity, thats it, you cant make it do any more work in a clock cycle.
in all of those cases, my cpu tops at 41º.

tom10167 · Jan 26, 2004

Most likely a result of room temperature change. Your 6 degree change is only 5.4 degrees difference in Farenheit, so that's probably just your heater turning on or off.

waynebike · Jan 26, 2004

ah ic, so im just wrong

thanks for info

i seem to always be asking stupid questions heh

craneage2001 · Jan 26, 2004

I've found that CPUBurn gets my temps a few degrees celsius higher than when I run Prime95 @ priority 10. I imagine it has to do with data loading in prime...

mccoyn · Jan 26, 2004

Actually, when your CPU is at "100%" load it only means that it is handleing as many instructions as it can. Typically, this means that as much as 2/3 of the processor is idle. The reason is that you arn't always doing everything a processor can do. If your program doesn't do any floating point operations, for example, the floating point execution units will not be used, but you will still get "100%" load.

A good load program would provide instructions in a mix that is close to what the processor can handle. This would reduce the amount of idle execution units and make the processor hotter.

This idle part of the processor is exactly what Intel was trying to get at with their hyper-threading technology.

David · Jan 26, 2004

I use Folding@Home - the Gromacs core uses SSE and does heat the CPU up nicely.

Folding@Home can be found at http://folding.stanford.edu and Overclockers.com is team 32

syberspy9 · Jan 26, 2004

same prime 95 set my cpu to the hottest i can get it 41C (stock cpu cooling P4 2.4C)

GM1010 · Jan 26, 2004

CPUBurn gets it the hottest, 2 or 3 deg higher than anything else.

JDizzle · Jan 26, 2004

Kristen Kruek gets me pretty hot

vonkaar · Jan 26, 2004

I agree with the previous statement.

I run 3Dmark2001 while folding 24/7, crunching superPI, Toast and cpuBurn all at the same time. For good measure, I also do a bit of mpeg4 encoding straight onto a 4Gb ramdrive. However, my CPU seems to get hotter when I watch Smallville episodes. Weird, huh?

05virulosity50 · Jan 27, 2004

latex

Soja · Jan 27, 2004

Cpuburn.

P2P · Jan 27, 2004

mccoyn said:
Actually, when your CPU is at "100%" load it only means that it is handleing as many instructions as it can. Typically, this means that as much as 2/3 of the processor is idle. The reason is that you arn't always doing everything a processor can do. If your program doesn't do any floating point operations, for example, the floating point execution units will not be used, but you will still get "100%" load.

A good load program would provide instructions in a mix that is close to what the processor can handle. This would reduce the amount of idle execution units and make the processor hotter.

This idle part of the processor is exactly what Intel was trying to get at with their hyper-threading technology.

so would it be better to run 2 or even 3 of these programs at a time to use all of what can be used? or will that just cause more problems?

??
P2P

gustav · Jan 27, 2004

i would say running a two programs that tax the cpu, and one that taxes the vid card. this way, the vid card will heat up the case while the cpu is working, which will make it hotter.

personally i find that running prime 95 and folding at home with HT turned on runs my rig 2-3 degrees over what just folding does.

FIZZ3 · Jan 27, 2004

If the temperature difference between any of these CPU loading programs makes a difference to your system's stability, you need to think about increasing your safety margin. Imagine using the 'hottest' program for stability testing and you cool your system just good enough so you don't crash. The next day the sun shines...

In other words; get better cooling!

Voodoo Rufus · Jan 27, 2004

System cooling did an interesting article on this not too long ago. I dug it up: CPU burn tests

Of the programs I've run, Seti/Folding made my CPU the warmest, but I generally use Sandra's burnin for stability testing, like 20-30 runs.

mccoyn · Jan 27, 2004

Hottest my CPU got was 90 C running Prime when the CPU fan died. I noticed it and shut it down before I could boil water with it.

With hyperthreading running two stress programs should produce more heat. If the stress program is multithreaded, however, it only needs 1 instance.

FuzzyBallz · Jan 27, 2004

P95. SETI gives a soft 100% load. Running both at the same time actually shuts off SETI. But it never goes over 40C no matter what.

What makes you hotest?

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