• Welcome to Overclockers Forums! Join us to reply in threads, receive reduced ads, and to customize your site experience!

power on without cpu and ram

Overclockers is supported by our readers. When you click a link to make a purchase, we may earn a commission. Learn More.


Mar 17, 2002
The Darkest Star
is it ok to turn the power on in my system without the processor and ram on it? i dont have a processor and ram for my most recent system i am building and i would like to turn it on to see how fans and such are working.
If you do turn it on it will probably start but you will get no response from the computer at all. There is really no point.
augustwest said:
wont my fans come on thought? that is all i want to do.

if the PSU comes on, yes the fans will start.
Most motherboards will not power on without a processor or memory. The most you would get is the lights might flash once and you may get a beep, but no your fans will most likely not come on. If the fans do come on it will only be for an instant, about 3 revolutions max.

Go ahead and try it. Nothing will be damaged, just nothing will happen.