You dont' need that kind of power.
I did it and regret it...I have tons of PC's so no worries here...I will use it eventually.
All you need is an old Cell Phone charger or some other 300ma + 6 to 12vdc adpater.
read this post and ye' shal be learnith...
P.S. make sure you have "twister wire connectors" or some black electrical tape! no need to be getting DC shocked now is there!
How to hook a PC fan up with a normal DC Adpater Biatch
LOL
I had this up and running for me in about 10 mins...works great!
Gin_N_Juice......doin it now baby