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Hi - Yes is the short answer. Paragraph 220.127.116.11 of this link gives you the long answer. http://downloadmirror.intel.com/20953/eng/dz77sl-50k_TechProdSpec01.pdf Regards. Peter
Per the technical product specification, link below, your board supports PCI Express 3.0 x 16 graphics cards. Your PCI Express 2.0 x 16 graphics card should work if the slot is backwardly compatible with PCI Express 2.0 x 16. I think it does.