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 Radeon R9 280 Dual-X 3GB OC Video Card Review
Sapphire R9 280x Dual 3gb GDDR5 | Jawa
Refurbished: SAPPHIRE Radeon R9 280X 100363-4L 3GB 384-Bit GDDR5 PCI Express 3.0 CrossFireX Support Video Card Tri-X OC version - Certified Refurbished GPUs / Video Graphics Cards - Newegg.com
Compatible power supplies with SAPPHIRE AMD Radeon R9 280X Dual-X OC - Pangoly