Nvidia GeForce 8800 GT

The Nvidia GeForce 8800 GT was a mid-range graphics card released by Apple in February 2008 as a build-to-order option for the 2008 1st-generation Mac Pro with its faster PCIe 2.0 slots. It is based on a GPU chipset developed by Nvidia. A PCIe 1.0 version with a 32-bit (instead of 64-bit) EFI was also sold separately for older Mac Pro models.

Description
The GeForce 8800 GT is based on Nvidia's G92-270-A2 graphics chip that was fabricated by TSMC on the 65 nm process. The GPU clock speed was 600 MHz, producing up to 336.0 gigaflops. It contained 512 MB of GDDR3 video RAM. The card features two dual-link DVI ports capable of driving up to two two digital displays at 2560 x 1600 pixels, such as the 30-inch Apple Cinema HD Display. With DVI to VGA Adapters, up to two analog (VGA) displays could be supported at up to 2048 x 1536 pixels. It took up the space of a PCIe 2.0 (or 1.0) x16 slot, and required an auxiliary power cable.

Support
The GeForce 8800 GT required a minimum of Mac OS X 10.5.2 with the Leopard Graphics Update, which did not come pre-installed on the earliest shipments of the 2008 Mac Pro.