KhellQc :
lol sorry Ithought I pasted it xD
SAPPHIRE Vapor-X 100314VXSR Radeon HD 6870 1GB 256-Bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video
[hit wrong button, my bad] you can use any GPU that uses the "Barts" core. According to wikipedia (http://en.wikipedia.org/wiki/Radeon_HD_6000_Series#Radeon_HD_6800) this includes the 6850, 6870 and a card made by Powercolor called the 6870X2 which, like the 295X2, is basically a dual chip GPU with two 6870s. The 6870 will be much easier to find, though and will be more economical as they can be found for under $100 USD on ebay.