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flow_CH July 28, 2013 08:43

CPU damage or not

I am using parallel processing in fluent.
My PC cpu is dual core 2.5 Ghz and 2GB ram. In parallel processing the cpu usage goes to 100% for many hours. Is this process will damage to cpu or other hardwares?

mjgraf July 28, 2013 10:15

if you have proper cooling should be fine.

HPC run for days, weeks, months with high power cpus running full bore.

flow_CH July 28, 2013 10:45

so i think it is better i give rest cpu after each a hour. Yes?

mjgraf July 28, 2013 10:48

do whatever makes you feel comfortable.
keep in mind your productivity will be substantially reduced.

if concerned, you can always monitor cpu and systemboard temp and fan speeds.

jdrch July 28, 2013 22:09


Originally Posted by flow_CH (Post 442432)
so i think it is better i give rest cpu after each a hour. Yes?

No. Your system BIOS will throttle the CPU/system accordingly to prevent heat issues, and most motherboards will shut down long before heat damage to the CPU becomes a problem. As such, there is zero chance of CPU damage from computational load.

mjgraf July 28, 2013 22:30

in thermal overload situation, the system will typically freeze and thus all work is lost.
just from the statement of dual core 2.5GHz with 2GB ram, this is most likely an older machine. Hence dust, older thermal paste, etc. can create heat issues in the machine to create unstable operation. while this will typically not harm the machine it will definitely harm productivity and cause frustration.

your OEM or motherboard manufacturer will typical have utilities to monitor thermal temps and fan speeds. You will probably see this ramp up from idle temps and level off or go into a small cycle pattern depending on power management settings. These should fall well within the thermal limits of the cpu/systemboard and should run trouble free. If not, probably a good idea to power down, open up the case and check your heatsinks and fans for dust collection.

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