Gaming PC Build Under $700

Hey guys! I've been reading all the PC build threads the past few weeks and it gave me the bug to go out and build myself a new rig

Let me start off by saying I'm not a huge PC gamer, but with Path of Exile going open beta a few weeks ago I've spent my gaming time on the computer

The current computer I'm using is roughly 6 years old, so needless to say it needed upgrading. I didn't want to spend a whole lot of money as I'm a poor bastard, so I wanted to build a decent rig under $700 bucks. Had to sacrifice some stuff and go AMD instead of intel, but I got a pretty nice build for cheap. Let me know what you guys think

Video Card: SAPPHIRE Radeon HD 7850 100355-1GOCL Video Card OC Version

Power Supply: CORSAIR TX Series CMPSU-650TX 650W Compatible with Core i7 Power Supply

Hard Drive: Seagate Barracuda 1TB 3.5" SATA 6.0Gb/s Internal Hard Drive -Bare Drive

Case: COOLER MASTER HAF 912 RC-912-KKN1 Black Computer Case

CPU: AMD FX-4100 3.6GHz (3.8GHz Turbo) Socket AM3+ Quad-Core Desktop Processor

Motherboard: GIGABYTE GA-970A-UD3 ATX AMD Motherboard

Memory: Patriot Viper 3 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 15000) Desktop Memory

Total Price: $677.93

I saved a bit of money not having to buy windows 7 or a dvd drive (using my old one). But I can play pretty much any game out there on high - ultra settings and didn't break the bank.

Edit: Bought everything off of newegg. If you anyone wants to see the price of each item let me know and I can throw it in here.