Is the 500W Cooler Master PSU sufficient for below config?

FZ

Reputable
Dec 1, 2015
2
0
4,510
Hi,

I have a desktop with below config:
* ASUS M5A97 EVO R2.0 motherboard
* Corsair 2X4GB RAMs DDR3
* Corsair H50i Liquid Cooling
* AMD Radeon HD 6730 GPU
* AMD FX 6100 CPU
* Cooler Master 500W PSU
* HP DVD RW
* WD 1TB HDD

but i want to add one more graphic card, AMD Radeon HD 7770 to the above config. Will the PSU be sufficient?.

Also can different versions of graphic cards will support Crossfire, since both are crossfire compatible.

Please advise.