HI.. I have a problem with whether my PC is recvng enough power after recently installing a new MSI GTX 770 Graphic Card? The box says it requires 600W minimum Power so, I picked up a Corsair VS650W PSU. Am not sure if this is giving enough power to my card and machine as the game I used to play is no longer playable although, I recv no messages about 'lack of power' or booting problems? Is this is a software issue or could it be my hardware?

Any feedback is greatly appreciated!

MY specs are:

i5 4430
12GB DDR3 RAM Vengeance
B85 Mobo
500 GB Seagate HDD