Best Buy: Asus AMD Radeon HD 7970 3GB GDDR5 PCI Express 3.0 Graphics Card HD7970-DC2T-3GD5
MSI Radeon HD 7970 3GB GDDR5 PCI Express 3.0 x16 CrossFireX Support Video Card R7970-2PMD3GD5/OC GPUs / Video Graphics Cards - Newegg.com
AMD Radeon HD 7970 - NotebookCheck.net Tech
Refurbished: SAPPHIRE Radeon HD 7970 3GB GDDR5 PCI Express 3.0 CrossFireX Support MBA with blower fan Video Card 21197-00-CPO GPUs / Video Graphics Cards - Newegg.com
AMD Radeon HD 7970 Specs | TechPowerUp GPU Database