I have been unable to find out what the CFM and the dBA of the original Color Classic fan is.  While I am doing an upgrade, I would like to move more air and perhaps use a fan that makes less noise.

The fan most often referred to as a replacement fan for the color classic has a CFM rating of
24 and a dBA rating of 21.  How this compares to the original is unknown to me.

I found a after market fan that is the same size as the original fan in the color classic, and it is rated at 42.6 CFM and 25 dBA.  It cost $8.00.  For an additional $3.00 you can buy a rubber grommet to go around the outside of the fan to reduce vibration (or make one out of any kind of rubber or even cardboard).  You can also go to Lowells or Home Depot and pick up some rubber grommets that you can place around the screws to further reduce any kind of vibration noise.

Here is the link:

http://www.frozencpu.com/products/16678/fan-1037/Lepa_80mm_x_25mm_70D_Cooling_Fan_-_12V_7V_5V_LP70D08R.html#blank

It is a Lepa 80mm x 25mm 70D Cooling Fan, model number LP70D08R.

Here is the same fan on Amazon for $7.60 plus free shipping:

http://www.amazon.com/Lepa-80mm-Cooling-LP70D08R-Black/dp/B008R784VK

This fan is only 25mm thick.  The Color Classic house the original fan sits in, can support a 32 mm thick fan.  Bugger fan = more air movement, right? Right.  But it also means much more noise. I saw dBA numbers of 40 + wsith 32mm thick fans.  A bit too much or me.

jack