Just so you know, to use the FX 9370 you need a 990FX chipset board that supports a 220W processor. To run that with a graphics card, you should get a PSU for at least 600W
If you have a 990FX board but it doesn't support 220W processor, get the FX 8350 instead.
If you haven't got your motherboard yet, then get a Haswell i5 with a Z97 chipset board. 500W is sufficient to run an Intel setup with a graphics card.
Whatever PSU you buy, it should be minimum 80 Plus Bronze rated. Never skimp on PSU quality.