Case fan on a CPU heatsink?

[rip]

Is there a difference between the run-of-the-mill case fan and the fans you see on a stock or cheap replacement CPU hsf? A friend has an AMD S754 with a fan on it that sounds like a jet. Could I just get her a quiet 60mm case fan and put it on the CPU heatsink?

 

[toadeater]

Originally posted by: rip
Is there a difference between the run-of-the-mill case fan and the fans you see on a stock or cheap replacement CPU hsf? A friend has an AMD S754 with a fan on it that sounds like a jet. Could I just get her a quiet 60mm case fan and put it on the CPU heatsink?

You could use a regular case fan if you don't mind it running at full speed all the time. Otherwise, you can get a fan with PWM support so that the motherboard can control the fan speed. Like one of these:

http://www.newegg.com/Product/...x?Item=N82E16835186015

 

[imported_Scoop]

It would be nice to know which HSF your friend has, you can't just slap a fan on every heatsink. Also, quiet 60mm fan that's enough to cool a CPU heatsink? Sounds kinda impossible..

 

[BlueAcolyte]

60mm fans are never quiet unless they are stopped. The bigger the fan, the quieter and cooler they are.

 

[BonzaiDuck]

Depending on the heatsink and its fittings, it is possible to either build or buy an adapter (metal or clear-acrylic) which can then be used to fit a larger fan to the sink. But I doubt that these options are easily accommodated to a stock Intel heatsink. I say "not easily" -- but not impossible.

 

[Zepper]

http://www.buyextras.com has a good selection of 60x25mm fans. I bought a 70x25mm Evercool fan for my HS and it does a lot better job than the original 70x15mm fan even cranked back to 2300 rpm where it is pretty quiet. buyextras, SVC, jab-tech and Nexfan have decent selections of 60x25mm fans.

Tip: fan adapters generall don't do well on CPU heat sinks as they increase the back pressure - you have to use a pretty strong fan to overcome it. Better to buy a whole new HS with a larger fan.

.bh.

 

[Jhhnn]

Get one of these, if it'll fit in the case-

http://www.svc.com/rr-cch-l9u1-gp.html

Easy to mount on S754- the pic of the way in the rear...

You pay only shipping after rebate... not sure if it comes with thermal grease... you need some if it doesn't.

 

[wwswimming]

it depends on the system config.

i have a Noctua heat sink in a Vista system. the Noctua
has a 120 mm fan, and the case fan next to it is 120 mm.

in that configuration - "Case fan on a CPU heatsink?" - yes you
can do it.

 

[rip]

That's a swingin' deal on the Coolermaster Jhhnn. I wish I could do more than one on the rebate as the shipping only goes up a few cents. Still 7.25 for a $30 dollar hsf is GREAT. I was leaning toward just slapping one of these on there. I see that various HSFs use various bearings (sleeve/ball/fluid/etc) and that was my concern -- whether or not the construction of the fan was such that the case fans were more dispensable than a fan that would come on a CPU HS. Anyway, all good stuff here; thanks to all