Replacement CPU Fan for: P4-- 2.4 GHz: minimum CFM I need? I have a Pentium 4, 2.4 GHz CPU, Socket 478 I want to replace my Fan, for the 2nd time, with a still quieter one— What is the minimum &/or recommended CFM [cubic feet per minute]I need? I don’t play video games or watch movies or anything I believe is CPU intensive. I ask the minimum CFM because: the less air volume, the quieter the fan tends to be. ---- 1]The current Fan is 20 CFM , 36.5 dB, 60 x15 mm. The heat sink is 60mm x 60mm x 35mm w 42 fins of skived aluminum. 2]The original Fan was 24.4 CFM , 40 dBA [& heat sink ] by Dynatron.

A larger fan will provide as good or better cooling at a lower RPM & should produce less noise. Or if you have the room for it, you could try something like this: http://www.svc.com/cod1ae4licpu.html ASUS A7N8X-X Athlon XP 1800+ 8.5 x 200MHz 1024MB PC3200 2.5-3-3-7 Asus A9550GE/TD 128MB WinME/WinXP Pro SP1

I figured your goal is to cut all noises to the barest minimum, if that's the case have you considered a fanless cooler like the Nitrogon. List of lists

Thanks,that's my plan: to use a fan of greater height: a 25mm case fan to replace the 10mm height CPU fan I have. I'm assuming that if the CFM's are the same the cooling will be equal, even if the RPM's are lower. [And I also hope to use the minimum CFM's I believe safe for my application.] Is all this going to work correctly?

Corrections to my post above-- should read: I want to replace my 15mm height CPU fan,with a quieter, 25mm height [it's a small "case fan" --same base size as mine]. ---------------------- Additions : I can get this relacement fan for just $3.75, but it's 19-21 CFM's which may be a bit low? or another fan for $6 that's 18 CFM, but very quiet--only 23 dB-- hence my question!

I was thinking you'd replace the entire heatsink/fan combo & go with something that has an 80mm or 92mm fan rather than a 60mm. ASUS A7N8X-X Athlon XP 1800+ 8.5 x 200MHz 1024MB PC3200 2.5-3-3-7 Asus A9550GE/TD 128MB WinME/WinXP Pro SP1

I don't know how that would fit -- the fan must have a 60mm square base to fit the 4 screw holes on the Heatsink.