Is it compatible?

I'm going to buy a new graphics card, a Sapphire AMD Radeon HD6570 1GB, I'm wondering if it's compatible with my pc. I currently have a ATI Radeon HD 5500.

FOXCONN A6GMV motherboard.

420v power supply.

AMD Athlon x2 5200+ cpu.

1920x1080 monitor resolution

3 gigs of DDR3 RAM.

If there's anything I should know before purchasing, please let me know. (or if there's something else I have to mention in order for you to be able to give me an answer)

Thanks.