will my powersupply handle this videocard

i doubt it, i just bought a pci express x16 card from newegg at around that price it was a 6600gt with 128mb and that needed atleast 350W. I would say no but it could happen.
 
It should say on the side of the psu its specs, like 28A on the +12V rail or something like that. Thats what you need to check.
 
I don't know what the rest of your system looks like, but you can run an AMD Athlon 64 3500+, SLI with 2x Nvidia 6600gt, and various other things on a 350W PSU. So I'd say you would be "okay" if you stayed with the 305W PSU, but I would recommend going with a better one, not just for the sake of this build but also for future builds. You can get 450W PSU's for only $50 on newegg.
 
Get a Hyper R 580W Modular PSU like mine lol, its good, it gives neer perfect voltages, and does its stuff pritty well for the price:D
 
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