The HIS 4670 IceQ specs list PCI express 2.0 x16 compatibility. My board is the Asrock 939 dual sata II which is compatible with Pci express 1.0a x16. The 2.0 card is probably backwards compatible but my question is will my framerates on games be a lot less using 1.0 ? My current card is a Sapphire Radeon x850xt.