Prelude - as you know I've been doing a fair bit of MacPro upgrading: (with extra thanks to my special helper - you know who you are but I am not going to name you...!)
HEXUS.net - Article :: Apple Mac Pro: the ultimate workstation - upgraded : Page - 1/2
HEXUS.net - Article :: Upgrading your Mac Pro's RAM - five minutes saves £200 : Page - 1/2
HEXUS.net - Article :: Upgrading your Mac Pro's hard drives and WiFi: save money and have fun : Page - 1/2
HEXUS.net - Article :: When dual Xeon 2.8GHz CPUs aren't fast enough: upgrading a Mac Pro to dual 3.2GHz monsters : Page - 1/4
.... now it is running an 8800GT instead of the 2600 which it came with.
I've even got the offical Apple cable too so it runs off the mainboard rather than some molex hack - I bought the cable from here 922-7128 NVIDIA Quadro FX 4500 power Cable Apple Mac Parts and Repairs from VIS Ltd it cost me £14 + £7 postage I believe - and took 2 weeks to turn up - they import them from the USA.
I literally powered down the system and booted up with the new card, no need to restart OSX found the card and just worked.
If you want to flash a card for your MacPro you need this BIOS - 8800GT Mac Bios
You then boot off a bootable disk and you need NVFlash (Must be 5.57 or higher!) - grab it from here - NVIDIA NvFlash 5.63 download from MVKTECH.net
** UPDATED LINK ABOVE! **
Before nuking your card do this - To see your ROM ID using the Nvflash tool the command is: nvflash --check
You need to have the 1MBIT rom in order to allow you to load the 64BIT EFI based BIOS
Pic
Proof
I got to thank young James Smith (JARS) for flashing the card for me (and finding one which has the right size rom chip) and sending it to me - just so everyone knows which card I am running it's this one: HEXUS.net - Review :: Inno3D GeForce 8800 GT 512MiB Overclock: the best one yet? : Page - 1/10
The donor system was a Mac Pro 2008 - Dual 2.8GHz Quad Core with 2GB Ram a 2600XT and a 320GB HDD it's been totally hacked apart and is now:
Dual 3.2GHz Quad Core Harpertown
10GB RAM
4 x 500GB Drive
1 x 8800GT
It's been interesting path - and I am going to hopefully run this system for a while - there is one last thing left to do - change the optical drive to a SATA one since the one it ships with simply sucks.