HOWTO: use a PC GeForce 9800GTX+ in a real Mac Pro

UPDATE: I would highly suggest using netkas’ new universal ATI/NVIDIA injector.

1. Obtain a card that uses one or two 6pin PCI-Express connectors for power.
2. Step 2: obtain two ATI mac PCI express power adapters ($30) or make your own for $10.
3. Install this version of NVkush if you have a 512MB card. if it’s some other size, you may have luck by using diabolik’s NVkush plister. I only had to mess with nvkush in order to make this work, no other kexts required editing in 10.5.6.
4. rename AppleTyMCEDriver.kext to AppleTyMCEDriver.disabled
5. rename AppleUpstreamUserClient.kext to AppleUpstreamUserClient.disabled
6. boot with the display connected to your old 7300GT. If NVkush has done its thing, your screen on your 7300GT might be rotated 90 degrees. this is ok. [fixed in 10.5.7]
7. switch display to 9800GTX+
8. if you have a “hole” covering the top left portion of the screen that you cannot see, switch display back to 7300GT, wait to see your desktop background, and switch back. [fixed in 10.5.7]
9. Check system profiler for quartz extreme and core image support.
10. ENJOY!!!

Xbench score

Click through for video proof that it works ;)