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
V277-053R MSI Radeon R9 280x Twin Frozr Gaming 3GB GDDR5 DVI/HDMI2x Mi Video Graphics