AMD Radeon R9 280X Video Card Review w/ ASUS, XFX and MSI - Legit Reviews
MSI R9 280X Gaming 3G GPU Review - Modders Inc
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
ASUS R9 280 DirectCU II TOP Specs | TechPowerUp GPU Database