AMD Radeon HD 6970M 2048 MB CUDA

Hello

I have an iMac 3.4 GHz Intel Core i7/32GB RAM/ AMD Radeon HD 6970M 2048 MB running 10.8.3. After updating to 10.8.3 I went along updating other bits and bobs and the CUDA System Preferences, which I installed long ago, wanted to be updated.

CUDA Driver Version : 5.0.45

CPU Drive Version 8.10.44 304.10.65f03

The CUDA system preferences also informs me that no newer CUDA Drivers are available. So it's up to date.

My confusion is as follows, CUDA, as I understand it, unlike OpenCL which is open, is proprietary and for NVIDIA cards only or is it? Does my GPU work with this CUDA Driver? It must because I succefully installed it and generally the mac hesitates installing if something is not designed for whatever is inside the machine.

Can someone please clarify because I can't find links or information to on CUDA being compatible with AMD Radeon HD 6970M.

Sincerely

PS I am posting this before I research on how to get BOINC to take advantage of my GPU where applicable.