Using and EFI string to support SLi in 10.6.2

[Vic-Viper]

Solution found by adding both cards into grfxutil via plist and using the resulting EFI string in the Apple boot file. I'll post the URL of the guide and files once I find them again.

 

ORIGINAL POST BELOW

 

Let me start with a little background. I bought an Asus CG5290 Desktop Core i7 with a nVidia 260 GTX. It houses a Rampage II Gene motherboard (or so I thought) I looked up the motherboard and liked what I read. When I got it home and installed a second card, SLi did NOT work in Windows. Appearently Asus gimped the motherboard to avoid paying licence fees. No RAID, no SLi. I force fed it the regular BIOS, it took at first but was very unstable. I later extracted the nVidia cert from the real Rampage II Gene and compiled it into my BIOS. Worked like a charm. I went thru a lot of trouble to get SLi support so needless to say I would like to keep it.

 

Here is my setup:

Rampage II Gene (gimped ver)

nVidia 260 GTX 896MB x 2 in SLi

Intel Core i7 920

 

Snow Leopard is installed on its own partition with Chameleon RC4 on a seprate partition.

After installing I updated to 10.6.2 to obtain native nVidia 260 support.

 

When I start 10.6.2 with one card, it works flawlessly. Full speed, full res. If I put in both cards, it will load completely in -v (verbose mode), clear the screen where the main OSX gui would show, remain black for a few seconds, then inform me I need to reset my computer.

 

I have tried the following

 

Boot options

• graphicsenabler=yes
  
• graphicsenabler=yes pciroot=1
  
• graphicsenabler=yes arch=i386 debug=0x0144
  

 

10.6.2 will load if I remove the NV* kexts, but then I dont get video acceleration.

 

I would like to disable access to the second card in the DSDT if possible. Any other DSDT patch advice would be very welcome.

 

You can find my DSDT here. Its completely untouched.