TCC Driver and problem of detecting Tesla C2050

I've got a Supermicro mainboard with onboard Matrox G200 VGA card, and I'm trying to install 4 Tesla C2050 cards strictly as GPUs. I'm running Windows Server 2008 R2 x64. I can't get CUDA to recognize the cards, no matter what drivers I use (release or beta). Whenever I run the bandwidthTest or deviceQuery programs, I get an error message saying that no CUDA capable devices have been detected.

TCC Driver works for Tesla M2050 without any problem. For Tesla C2050 follow these instructions: 1. in regedit, go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ Class\{4D36E968-E325-11CE-BFC1-08002BE10318} 2. look through the list of device nodes (labeled 0000, 0001, etc.) 3. if HardwareInformation.AdapterString says "Tesla C2050", add a DWORD called AdapterType and set it to 2. 4. do that for both devices. 5. reboot.