Disclaimer: I work in the GPU industry. If you're interested in the architecture of a GPU this Berkeley ParLab presentation by Andy Glew from 2009 covers the b

Disclaimer: I work in the GPU industry. If you're interested in the architecture of a GPU this Berkeley ParLab presentation by Andy Glew from 2009 covers the basics of how the compute cores in modern GPUs handle threading. It's a subtle, but powerful, difference from SIMD or vector machines. http://parlab.eecs.berkeley.edu/sites/all/parlab/files/20090827-glew-vector.pdf http://parlab.eecs.berkeley.edu/sites/all/parlab/files/20090... If you want to get into the details of how a GPU interfaces with the system and OS software, which is almost an entirely other animal, you may want to look at the Nouveau project to get oriented. http://nouveau.freedesktop.org/wiki/ http://nouveau.freedesktop.org/wiki/