I have a Mac Pro 1,1 running Yosemite (and maybe El Capitan soon) that I'm hoping to get a little more life out of... does anyone know which video cards are confirmed to work in the Mac Pro 1,1 out of the box? I've scoured some threads and found conflicting reports about certain cards. I'm trying to find something in the sub-$200 range that's better than my (dreadfully loud) Radeon HD 5870.
The HD5770 and HD5870 are the best that properly support Lion + boot screens + newer OS like Yosemite, or El Capitan. I wanted Lion support for when there is an update, and the boot.efi breaks. Easy to just boot into Lion to fix it.
The Sapphire 7950 mac edition also works in a 1,1 with boot screens but Lion drivers dont work right. As long as you dont need Lion support, you can go with the 7950.
According to MVC, for nvidia cards in the 1,1 with boot screens, your limited to the 8800GT as the best one.
If you dont need boot screens, and are going to use yosemite/el capitan, then you can even just use a PC type nvidia, or AMD card.