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
VTX3D R9 280X Specs | TechPowerUp GPU Database
XFX Radeon R9 280X Black Edition (1080 MHz) R9-280X-TDBD B&H