Need a computer.

So I have been thinking in getting a gaming PC, but don't know what to get. It's ok if it's parts, I have experimented with that. My budget is $800 and I need a operating system. No need for a monitor, keyboard or mouse. Thanks if you can help.

 

Well, I would go troll mode and blow your budget on a Razor mouse pad, but I'll look for a few things that'll fit in your budget and give you excellent performance. Stay tuned. ;)
Also, I would recommend going to pcpartpicker.com and selecting parts that'll fit in your budget, it'll also tell you if they're compatible.

 

Here's what I built ya. It's certainly a powerhouse for a budget. I left out the optical drive because I didn't know if you wanted Blueray or whatever, I also put a case on, but you can change it to whatever, just make sure it has ATX, not Mini-ATX, or anything that isn't simply ATX. I hope you enjoy and consider building it.
http://pcpartpicker.com/p/JWPjQ7