Amazon.com: Epic IT Service AMD Radeon HD 5770 1GB GDDR5 Mac Edition, with 1GB GDDR5, Dual Mini DP and one DVI Output Ports, for Mac Pro 1,1 to 5,1 Models, macOS up
PowerColor Radeon HD 5770 PCS+ 1GB GDDR5 Reviews, Pros and Cons | TechSpot
ATI Radeon HD 5770 Specs | TechPowerUp GPU Database
ATI Radeon HD 5770 Will Support 3440x1440… - Apple Community