Amazon.com: ASUS HD7770-DC-1GD5-V2 - Graphics Card - Radeon HD 7770-1 GB GDDR5 - PCI Express 3.0 x16-2 x DVI, HDMI, DisplayPort : Electronics
ASUS Radeon HD 6850 1GB GDDR5 PCI Express 2.1 x16 CrossFireX Support Video Card with Eyefinity EAH6850 DC/2DIS/1GD5/V2 GPUs / Video Graphics Cards - Newegg.com