750W 24/20 Power Supply Question!

Hey everyyone!

I just upgraded my power supply from my old 600 watt one that blew out to this one:

http://cgi.ebay.com/ws/eBayISAPI.d [...] 0184657245

I wanted to know if the power supply has enough power to run a new GTX 280 or something real good. I don't really know what the requirements are other then the new power supply having a 6/8 pin power connector and 750 total Watts. Thanks


I was thinking of getting like a:

http://www.newegg.com/Product/Prod [...] 6814150359

or

http://www.newegg.com/Product/Prod [...] 6814150343


I have an ATI Radeon 4850HD 512mb gddr3 now that will definately work with it, but how about the newer models with my new PSU.

Thanks-