The Radeon HD 5870 Mac Edition was a high-end graphics card by ATI, launched in June 2010. Built on the 40 nm process, and based on the Cypress graphics processor, in its Cypress XT variant, the card supports DirectX 11.2. The Cypress graphics processor is a large chip with a die area of 334 mm² and 2,154 million transistors. OEM Apple AMD ATI Radeon HD5870 1GB Graphics Card Mac Pro 1,1 2,1 3,1 4,1 5,1 $299.99 ASUS Radeon HD 5870 GDDR5 256bit 1GB Graphics Video Card upgrade for Mac 1,1-5,1.
Here for sale is a Genuine Apple ATI Radeon HD 5870 1GB Graphics Card and is compatible in all models of Mac Pro from 2006-2012. Detailed spec for the card can be found below but for outputs this has single DVI and two Mini Display Ports (These are useful if you are connecting to one of the newer Apple 24 or 27 inch displays).
Complete with the card you'll get the necessary 6 pin power cables that plug into the Mac's Logic Board to provide power.
Radeon 5870 Specs
These are awesome cards for the Mac Pro and also work very well in BootCamp :)
The ATI Radeon HD 5870 Graphics Upgrade Kit for Mac Pro desktop workstation. The card requires an available PCI Express 2.0 x16 slot for installation.
Ati Radeon Hd 5870 Mac Pro 3.1
The ATI Radeon HD 5870 GPU features 1GB of GDDR5 memory for superlative performance, making it a great choice for creative, scientific, and technical applications where 3D performance is critical. The card can drive up to three displays simultaneously. It features two Mini DisplayPort outputs and one Dual-Link DVI output. Apple offers optional adapters to drive legacy VGA displays.