Full Details from Amazon.com : http://www.amazon.com/gp/product/B002AKKMNI?tag=onigi-20
VisionTek ATI Radeon HD 4350 512 MB DDR2 PCI Express Graphics Card (900270)
512MB DDR2 memory
DirectX 101
Dual mode ATI CrossFireX multi-GPU support for highly scalable performance
PCI Express 20 support
Limited Lifetime Warranty