I recently upgraded to a 780ti and had no issues till I started playing bf4. It will kid up fine and I can play for a few min till the computer freezes. It still displays a picture but is unresponsive forcing me to shut it down. I didn't have this problem till I upgraded to the 780ti from my r9 270x and I only have the problem on bf4. I assume it's the power supply because bf4 is my most demanding game and it's the only time I have a problem. I know the cx 600 is a pretty week psu so I wouldn't mind upgrading I just wanna make sure it may not be another problem like a failing motherboard.
Specs
Fx-8350 black edition
Msi 780ti
Fatality 990fx
Cx 600
Specs
Fx-8350 black edition
Msi 780ti
Fatality 990fx
Cx 600