Amazon.com: Epic IT Service - AMD Radeon HD 5770 1GB GDDR5 Mac Edition, for Mac Pro 1,1 to 5,1 Models, macOS up to High Sierra (Attn: Legacy Model) : Electronics
ATI Radeon HD 5770 Specs | TechPowerUp GPU Database
299-1E148-102SA Sapphire Radeon HD 5770 1GB GDDR5 128-Bit PCI Express
XFX ATI Radeon HD 5770 1GB GDDR5 PCI Express 2.1 x16 CrossFireX 778656050600 | eBay
102C0160300 - ATI Tech ATI Radeon HD 5770 1GB GDDR5 PCI Express Video Graphics Card for Mac Pro Mid 2010