Graphic card compatibility

Solution
If your budget for the graphice card is just $150, then here is a the 3 components. The total cost is $311.65 USD, and it will use an estimated 335watts. Look for a 400w PSU if you don't already have one.
PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core 2 Quad Q6600 2.4GHz Quad-Core Processor ($96.00 @ SuperBiiz)
Motherboard: Gigabyte GA-G41MT-S2PT Micro ATX LGA775 Motherboard ($59.99 @ NCIX US)
Video Card: XFX Radeon HD 7870 2GB Video Card ($155.66 @ Newegg)
Total: $311.65
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-09-30 10:31 EDT-0400)
Is there a certain price range? Do you prefer AMD/Nividia/ATI?

There are alot of GPU's that will work, you just need to find one that suits you and doesn't bottleneck. Fore example, a GTX Titan would work, but the raw power of the thing would bottleneck from here to the moon and back.
 
If your budget for the graphice card is just $150, then here is a the 3 components. The total cost is $311.65 USD, and it will use an estimated 335watts. Look for a 400w PSU if you don't already have one.
PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core 2 Quad Q6600 2.4GHz Quad-Core Processor ($96.00 @ SuperBiiz)
Motherboard: Gigabyte GA-G41MT-S2PT Micro ATX LGA775 Motherboard ($59.99 @ NCIX US)
Video Card: XFX Radeon HD 7870 2GB Video Card ($155.66 @ Newegg)
Total: $311.65
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-09-30 10:31 EDT-0400)
 
Solution