Full Details from Amazon.com : http://www.amazon.com/gp/product/B001F0QADK?tag=onigi-20
HIS H487F1GP Radeon HD 4870 HDMI Dual DL-DVI HDCP 1GB 256bit GDDR5 PCI Express 2.0 X16 RoHS
GDDR5 memory
256-bit memory interface
DirectX 101
24x custom filter anti-aliasing CFAA and high performance anisotropic filtering
ATI CrossFireX multi-GPU support for highly scalable performance
