XFX AMD Radeon HD 5770 1GB GDDR5 PCI-E Video Card | eBay
AX57701GBD5-PPG Power Color Video Card
XFX HD-577X-ZMF3 ATI Radeon HD 5770 1GB DDR5 128-Bit Dual DVI / Mini DisplayPort
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
GV-R577UD-1GD Overview | Graphics Card - GIGABYTE Global
Best Buy: Sapphire Vapor-X ATI Radeon HD 5770 1GB DDR5 PCI Express Graphics Card 100283VX-2L
Buy the Sappire Radeon HD 5770 1GB GDDRS Graphics Card Untested | GoodwillFinds