295 cards, with three processors?

I just installed two 295 video cards to do some CUDA processing, on Windows 7 64bit. When I run various tools to monitor the temperature they report four processors.

However, when I try and run some software for CUDA processing they only see 3 processors?!?

I am not using SLI mode, and I downloaded the latest drivers I could get ahold of (, but still nothing.

Any ideas?

Looks like this is a much more serious issue than I would have thought. I found this thread, where at least on NVIDIA employee has been posting on the thread but still no solutions from what I can see.