10. December 2010
Like in Linux you can use nvidia-smi to set different modes on the TESLA GPUs.
nvidia-smi is located usually at: C:\Program Files\NVIDIA Corporation\NVSMI\nvidia-smi.exe
Go there with a command prompt and administrative privileges and type nvidia-smi -s. This gives you the current status and the status of TCC mode after reboot.
Set exclusive compute mode enabled for the first GPU by nvidia-smi -g 0 -c 1
Set exclusive compute mode disabled for the first GPU by nvidia-smi -g 0 -c 0
For other GPUs increment the number after -g
Also look at the first comment on how to change between WDDM and TCC driver model.
Thanky Francoise for reporting my mistake. I corrected it above