Radeon 7770 in Mac Pro 1,1

[Rokeneer]

Will it work? My biggest concern is that my computer runs PCI-E 2.0, and the card is 3.0.

Here is the link: http://www.newegg.com/Product/Product.aspx?Item=N82E16814102967

Also, what do the stream processing units do. I need to know, so i know how to compare the various graphics cards.

 

[BigJohno]

Will it work? My biggest concern is that my computer runs PCI-E 2.0, and the card is 3.0.

Here is the link: http://www.newegg.com/Product/Product.aspx?Item=N82E16814102967

Also, what do the stream processing units do. I need to know, so i know how to compare the various graphics cards.

This will work under windows only for the time being. It will not work under osx. I think you have pci-e 1.1 so you will not get very much performance out of it. If anything it won't be any better than 5770... Maybe someone can clarify my statement.