Hi Kevin,
Under the Intel configuration application I can only choose 32 bits. Nevertheless, I do not think the graphics card is sending a 10 bit signal to the monitor.
I have tested the 10 bits capability with an application from NEC made for this purpose (www.necdisplay.com/documents/Software/NEC_10_bit_video_Windows_demo.zip) and it returns the following message: "10 bit video is either not supported, or not currently enabled in this video card".
Maybe the problem is that the Intel driver does not support OpenGL? I think the 10 bit is only reachable through this API. In graphics cards of other brands the 10 bit graphics are only available in the provessional version of the cards, e.g. for Nvidia the Quadro cards.
Thanks!
Jordi.