Nvidia Geforce 8800GT 32bit and 64bit EFI 512MB GDDR3 PCI-X Graphics Card (GPU)

As stated on NVidia’s website, the NVIDIA® GeForce® 8800 GT for Mac is designed to tackle everything your gaming, graphic-mac geforce 8800gtdesigning, art-directing, illustrating, web-browsing, photographing, video-producing, HD-video-watching self can throw at it. With 112 processing cores and two DVI ports capable of driving two 30-inch displays at full resolution (2560 x 1600), the only thing to worry about is desk space.

Two variants of the 8800GT were produced, the first running at 1333mHz and the second at 1666mHz.  The first variant was developed and sold for a short period by Apple for use in the Mac Pro 1,1 (32bit EFI).  The second variant was released with a 64bit EFI.

Compatible with:


  • The 64bit Geforce 8800GT will not work in the original Mac Pro (1,1 and 2,1) as they both use 32bit EFI strings (2006 and 2007).  However, the graphics card is fully compatible with the early 2008 (harpertown) and later models (3,1).
  • Users report that a 8800GT with firmware ROM rev. 3233 works in the MacPro 1,1 (32bit EFI string).
  • Users who have purchased third party ‘flashed’ PC versions of the Geforce 8800GT may experience issues with the graphics card when they upgrade their mac pro from OS 10.5 to OS X 10.6.


Requires PCIx (2.0) and EFI 64 for later version and PCIx (1.0) and EFI 32 for older version.  Drivers do not require installing.

GPU Engine Specs:
112 CUDA Cores
600MHz Graphics Clock (MHz)
1500MHz Processor Clock Tester(MHz)
33.6Texture Fill Rate (billion/sec)
Memory Specs:
900MHzMemory Clock
512MBStandard Memory Config
256-bitMemory Interface Width
57.6Memory Bandwidth (GB/sec)

Flashing a PC 8800GT rom:

If you have a PC 8800GT and a PC, and want to try (at your own risk!), here are the steps to install a ROM image:

1. Find a USB key that you don’t mind formatting.
2. Download this program and install it: http://i.thepcspy.com/USB_Boot.zip. It is a Hewlett Packard program that makes USB keys bootable, but doesn’t only work on HP PCs. The archive password is pasta.
3. Use the program to format your USB key. Select the “Create a DOS Startup Disk” option and choose the folder “DOS System Files” from within the unzipped archive.
4. Once the disk has formatted, copy the rest of the files from “DOS System Files” to the root of the USB key. It may ask you whether to replace some files, say “no.”
5. Download nvflash 5.57. Any earlier version will not work with the 8800GT. http://www.techpowerup.com/downloads/819/NVFlash_5.57.html
6. Copy nvflash.exe and cwsdpmi.exe to the root of the flash drive.
7. Put the  8800GT in the PC, be sure to connect the additional power.
8. Reboot your PC and boot from the flash drive. You may have to enter your BIOS settings and tell it to enable USB boot. On my Intel bios this involves pressing F2 at startup, and the option is in the Booting screen of the BIOS.
9. Once the flash drive boots up, use nvflash to install the new driver.

Note though that the PC video card needs a 128K rom as opposed to 64k rom, which is usually installed to a PC video card. However, eVGA cards are known to contain 128k roms and work with the Mac EFIs

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