1.    How do you create and load your textures? 2.    Please use shaders or do you need to run on really old hardware? 3.    In the 3D context selection is called picking. You should find plenty of samples when you use your favorite search engine with this.

You can use PIX (part of the SDK) to get timings for the CPU site. If you use a nvidia GPU NVPerfHUD can help to measure the time for your draw calls.

Have you add code to clear the depth stencil buffer like you clear your render target?

The DirectCompute support in the current nvidia drivers is not enabled by default. You should contact their developer support to get more details about how you can activate it.

Direct3D 11 is not supported on Windows XP.

As I have already written before the beta works only on English Vista versions.

Take a look at the “10Level9 ID3D11Device Methods” part of the documentation. It tells you what you can do and what not based on the feature level.

Dou you call FindClosestMatchingMode with B8G8R8A8_UNORM as Format?

Run a shader that needs a long time to finish. This should cause a driver rest.

I don’t mean searching the forum. I was talking about the web. Sorry for being not more clear.