said by Keizer :

First of all, the PC specs:
* MSI P6N SLI Platinum
* Intel dual core E6600 2.4 ghz
* Two gigs Corsair DDR2 800 memory
* Corsair 620 watt PS
* Creative sound card
* SATA Maxtor 7200 rpm hard drive
* 2 EVGA GTS 8800 graphics cards in SLI
* lite-on SATA DVD burner

This is my sons system, and I gave him my old 8800 GTS to run with his identical 8800 GTS in SLI. These are both the early G80 based cards. The only difference between the two is one has 320 MB on board memory, and the other 640.

I have the switch card set up in the SLI position. Both cards are installed with the SLI bridge. I have the latest Nvidia graphics drivers, as well as system drivers installed. Both cards have the power connected. Both cards show up in device manager. In Everest, it says under "Nvida SLI" SLI status: Supported but disabled.

If I type "rundll32.exe nvcpl.dll,LaunchMultiGpuApplet" into run and hit enter, I get a screen that says "Your graphics cards feature SLI technology, However, your mobo is not qualified to run in SLI mode".

Any idea what is going on here? My mobo is SLI capable. Could the difference in on board memory between the two cards be causing this? I have the card with the least amount of memory in the primary PCI express slot on top. I was told that these two cards would run fine in SLI even with different amounts of memory.

Help!! Thanks!