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
Sapphire R9 280 Dual-x Gpu Backplate | ColdZero International
Club 3D AMD Radeon R9 280 GDDR5 3GB CGAX-R928X7O Video Graphics Card | eBay