the cfm is rated on the fan It wont be on a pc fan cuz its made in china and its for a PC computer. No one cares their company web site may have it but i doubt it. heres a link to determine ruff estimates. for CFM

http://www.madsci.org/posts/archives...4460.Eg.r.html

I think you mean when you say "(each amp is 1000ma??) "
That yes 1AMP is 1000mA

The power supply isn't the amp. A Amp is a measure of current.

Anyways, you can get some more powerful fans than that for the same price, I would look at some others. Mine are all 300mA And I have 3 of them on a 2Amp powersupply.

So I can still add 3 more. be careful never buy to big of a powersupply if your not going to run the fans. It will get hotter cuz its generateing unused energy.