I had previously a 350 watt power supply in my PC until I thought I get from my cheap graphics card GTX 650 (but which could also pose BF4 liquid on average) on a Gigabyte R9 280x Rev2.0 order. Of course it was from this point clear before I get me this, I must first chase up with a new 80+ power supply. No sooner said than done, but unfortunately came my graphics card up to 2 months later, as the R9 series was very hard to get until I had then ordered Alternate!
For this power supply you need but not necessarily a large minimum Case MidiTower :)