Upgrade your Mac Pro's graphics capabilities with this ATI Radeon HD 5770 graphics card. With 1GB of GDDR5 memory, this card provides powerful and smooth visuals for your daily computing needs. It is compatible with PCI Express 3.0 x16 and 2.0 x16 slots, and requires a 6-pin PCI-E power cable.Enjoy the benefits of multiple monitor support, SLI/CrossFire ready, and G-SYNC/FreeSync compatibility. This unit comes with a fan and heatsink cooling component, ensuring optimal temperature control. Connectors include DVI, HDMI, and Mini DisplayPort, making it easy to connect to a variety of displays and monitors.

I had a reboot issue that may have been an issue with either this card or the other identical one I had. I am selling them both as-is. They may not have any issue at all, or they might do it for you. They are priced accordingly.