Hello, i'm looking to upgrade from a GTX 560 to a single GeForce GTX 680 FTW 4GB and I wanted to make sure that my current 620W power supply would be enough to power the card without any stability issues. I plan on using this card for 1920 x 1080 gaming and plan to buy a second monitor. I'm looking for this card to play BF3, MOH:Warfighter, Crysis 1/2/3, Ghost Recon Future Soldier, and Farcry 3 Maxed out on ultra settings-and eventually across two monitors. I do not plan on using SLI with this card or overclocking past the factory overclock. Will 620W be enough to power the card? Thank you in advance!