Full Details on Amazon.com : http://www.amazon.com/gp/product/B001V3O2HW?tag=tsukuyomi-20
Apple MB999ZM/A ATI Radeon HD 4870 Graphics Upgrade Kit
Requires Mac Pro Early 2009 with 1066MHz DDR3 memory or Mac Pro Early 2008 with 800MHz DDR2 FB-DIMM memory with PCI Express 20 slot
Mac OS X v1056 or later
