Compact Gaming Build on a Budget

Approximate Purchase Date: e.g.: By August 15th

Budget Range: 400-550

System Usage from Most to Least Important: Gaming

Are you buying a monitor: No



Parts to Upgrade: All

Do you need to buy OS: Yes


Preferred Website(s) for Parts: newegg.com is what people have been suggesting to me so far.

Location: Near Boston Massachusetts

Parts Preferences: I hear AMD is overall cheaper in in price

Overclocking: I have no idea what this means =x

SLI or Crossfire: Read above

Your Monitor Resolution: Unsure, I don't currently own one, though I think a friend might have one I can use.

Additional Comments: As far as size goes it has to be small, maybe something like
Lian Li PC-Q11B
Or
Thermaltake Lanbox Lite

If possible I'd like to reuse some of my old PCs parts, though I'm unsure how well they'd fit in a smaller case. I don't know the exact specifications of the hard drive because it's not on me but it's Western Digital 350gb

Power supply is something like this


And Most Importantly, Why Are You Upgrading: To play Guild Wars 2 with my friends