This has already been done loong ago in Atari Flacon. IIRC, its DSP was designated for sound processing, but some people used it for rendering… 
I believe the proposed graphics high-end bus, PCI-X 16x, has more bandwidth than AGP 8x.
However, PCI-X 1x has less bandwidth, of course. IIRC, the “x” rating in PCI-X is how many leads there are on the bus, and each one gives you the same bandwidth as a single AGP channel (which, IIRC, is 2x PCI). I could easily be off by a bit, though; gotta look it up to be sure.
Originally posted by 3k0j:
This has already been done loong ago in Atari Flacon. IIRC, its DSP was designated for sound processing, but some people used it for rendering…
Ow, how nice. As you see - programmers are more clever than hardware designers are.
please leave sound for the soundcard, coz without soundcards, a whole lot of people will be out of job
But how about making it in opposite way? Would it be possible to use your DSP to optimize graphic’s processes? 