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PSU Overheating/Fan speed.

Last response: in Components
July 24, 2010 2:40:39 PM


I recently changed my PSU fan and since then it started to overheat every time i play a game for more than an hour!
Was the new fan of a lower RPM? Should i buy a 2000RPM Fan?

a c 250 ) Power supply
July 24, 2010 2:52:16 PM

What PSU do you have? The fan shouldnt need to be running full speed ever on a decent unit, im not sure if the fan on my EA500 ever turns on, i never hear it.

The RPM of the fan is important, but the design of the fan has a much larger effect. For a PSU since its such a small enclosed space you would need a fairly high CFM fan to maintain the pressure and force the air around the heatsinks.
a c 139 ) Power supply
July 24, 2010 2:54:19 PM

What was the RPM / CFM rating of the original fan?
What is the RPM / CFM rating of the fan you're using now?
CFM = Cubic feet per minute of air moved by the fan. Also can be rated as cubic meters an hour m³/h
Related resources
a b ) Power supply
July 24, 2010 3:32:16 PM

The CFM isnt exactly the best way to measure it, as 90% of companies over exaggerate by about 2:1 on the fans. Also, what size fan was it before, what PSU do you have, and what fan did you have before? You might want to buy a higher pressure fan, like made for dense heatsinks. This:

might make for a good PSU fan, although i wouldnt know.
July 24, 2010 4:33:24 PM


thanks for your replies.

My PSU is

I dont know the model number or anything about my new fan, but it is a cooler master fan and it cost me 250rs (5 USD)

The fan of my original PSU was replaced by this 5$ fan. Please tell me if it is ok, if not, then which is the proper fan that was supposed to replace original fan.

thanks all!

Best solution

a c 139 ) Power supply
July 24, 2010 4:46:19 PM

Your original fan was a Global Fan S1202512H: Global Fan website & fan specs

Try and match the performance of the original fan specifications. If you can find the model # of the new CM fan we can tell you something about it.

click the picture to find the reference website
a b ) Power supply
July 24, 2010 4:50:38 PM

wow that fan is pretty loud. terrible dB: CFM ratio.
July 25, 2010 2:11:16 AM

thanks for your replies guys! thanks a lot!
a b ) Power supply
July 26, 2010 5:17:07 PM

the first cooler master linked should be fine. :) 
July 27, 2010 3:52:07 AM

Thank you ares for your reply! :) 
a b ) Power supply
July 27, 2010 1:15:22 PM

your welcome! :) 
a b ) Power supply
July 30, 2010 6:36:38 PM

Best answer selected by mousemonkey.
a b ) Power supply
July 30, 2010 6:36:55 PM

The title of this topic has been edited by Mousemonkey
a b ) Power supply
July 30, 2010 6:39:37 PM

This topic has been closed by Mousemonkey