Powercolor radeon HD6870x2 (not 2 crossfires its actualy one card dual cored)
Newegg.com - PowerColor AX6870X2 2GBD5-2DHG Radeon HD 6870 x2 2GB 2 X 256bit (256bit) GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card with Eyefinity