Hello,
I have a 480 watt PSU and I want to but a GTX 650 Ti but it recomends 400 watts. I have 3 hardrives and a amd 6000+ that pulls 80 watts. Do I have enough to run a GTX 650 Ti.
I wouldn't use that power supply unit for GTX 650 Ti. It's ATX V1.3, which means it won't have enough power on the 12 V rail. I'd suggest getting a Corsair CX 430/Antec VP 450 at least.
It's better to have 4GB of course. But DDR2 is replaced by DDR3 and that makes it more expensive. If you're thinking of upgrading the rest of your system soon, you might want to save up your money instead.