Second power supply for radeon 4870

[ererr10]

I bought a Radeon HD 4870 and i was wondering if a Corsair VX450 would work for JUST the 4870 as a second. I already have a power supply for everything else, but i don't have 2 PCI-E Connectors.

 

[kite212]

what are the rest of the spec of your pc, and the main psu, cause it dosent take a lot to power a pc http://www.xbitlabs.com/articles/coolers/display/system-wattage.html

 

[ererr10]

The rest is this Phenom 2 955@3.4Ghz, WD Caviar 500GB, GIGABYTE AMD 790GX With integrated Radeon HD 3300. I cant find the box for the main PSU because i origionally built the computer in '05 or '06 and just recently upgraded it, but it only has one PCI-E connection