My current rig is:
MB Gigabyte 78LMT-S2
Amd Phenom x4 965 Black Edition
Corsair DDR3 1333 4GB
SSD Patriot 64GB
HDD Western Digital 500GB 7200RPM
PSU ULTRA 730W
For the GPU I think I will buy a gtx650ti or a 7850 , I will be gaming on a 1366 x 768 monitor. Is my PSU enough to buy either the 7850 or the gtx650 TI? or should I upgrade my PSU and go for the 7850 that is a better card? or the gtx650TI would be enough for my resolution and I should just stick with my PSU and get the gx650 TI?
The video card should tell you the min. power requirements for it. Most higher end vid cards required around 400 watts (check the item description). 730 watts should be able to power two video cards and maybe 3 hard drives.
730W might be tons of power, but who said that's what that PSU can actually output? The advertised wattage is very rarely what the PSU can output on the 12v, especially among lower end units where they will often add in the other rails to inflate the total.
Were going to need a link to the PSU, I cant find it anywhere and we need the specs of it before we can say if its any good. Though knowing ULTRA's reputation I doubt it.