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
XFX Radeon HD 5770 1GB GDDR5 PCI Express 2.1 x16 Video Card HD 577A ZN – Computizer
SAPPHIRE Radeon HD 5770 Video Card 100283-3L - Newegg.com