AMD Sapphire Radeon R9 280X 6GB Video Card Mac Pro 3,1-5,1 Metal 7950 7970 | eBay
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