Sapphire Radeon R9 280X VAPOR X - 3GB GDDR5, PCI Express 3.0 (x16), Overclocked - 11221-02-40G - 3 FREE Games up to $150 value after purchase, limited offer at TigerDirect.com
XFX Radeon R9 280X Black Double Dissipation Edition Video Card R9-280X-TDBD - Newegg.com
XFX R9 280X 3GB Graphics Card Review | eTeknix
Amazon.com: AMD Radeon R9 280X 3GB HDMI PCI Express Video Graphics Card for Apple Mac Pro, outperforms ATI Sapphire Radeon HD 2600, 4870, 5770, 7950, 9000, 9800 Gigabyte : Electronics