QUICK question!! :D Need a better power supply?

[afgking]

Hi fellow geeks,

Current system:

Asus Sabertooth 990fx
AMD fx-8150 with Hyper 212 evo cpu cooler
2x 1TB harddrives
1x OCZ vertex ex3 120gb SSD
XFX Radeon HD 7770 ( DD black edition) 1GB
OCZ 600W PSU 80plus certified

pheewww thats out of the way..

im thinking of getting an Asus HD 7770 1GB to run in crossfire with the xfx 7770 and im not sure if the PSU i have now is sufficient?

thanks in advance for any input.

 

[PC Gamer198]

You are on the limits i reckon, what does your GPU box say power wise, my old 1GB 6870 box recommends 600w for crossfire . but i always like to give some head room for future additions...