7900GT how many A needed?

[Hitech]

Hello.

Is it really true i need 20A on my 12v line to run a 7900GT?
Because ive ordered a eVGA 7900GT and waiting for it atm. (Any idea when shops in europe should start getting it in stock?)[/u]

 

[Hitech]

Actually i think i have 17A on the rail for Pci-E.
Should'nt that be enough?

Its this psu i have http://www.chill-innovation.com/cp450a2-specs.asp