Best sub $75 500watt power supplies

Maverick_

Reputable
Aug 22, 2014
6
0
4,510
I need advice on a power supply upgrade on my current build. I'd like to upgrade my graphics card to an r9 270x, but my power supply is already under the recommended for my current card. Right now my budget is limited. Thoughts and suggestions are appreciated.
My current specs:
AMD Fx-8320 @ 3.8Ghz
XFX Radeon HD 7770 Ghz Edition DD @ 1035Mhz
4gb Kingston HyperX Blu DDR3 1333
Antec 415watt power supply
1 tb seagate sata hard drive
generic dvd-rw burner