Ive got a few questions.. Planning to upgrade my Mac Pro 2010, cuz my 2008 8 core died *sob* (the 2010 was my gaming rig before this). The MP has a aging old 5770. My family runs a production studio and i was wondering if: 1. I know Mac Pro can't SLI.. But can After Effects sort of combine CUDA cores for better raytracing/rendering? 2. If #1 is possible, can i buy 2 x GTX570 and dump it on my Mac Pro? With external PSU of course. 3. If #2 is possible, what kind of external power supply will i need to power this beast? 4. If none of those above are possible, what is the best card i can get to have the best graphics performance for raytracing etc? (Not Quadro series.. Those are too expensive ). I can live without boot screens (PC cards) as long as it doesn't crash DVD player and stuffs. and 5.. I game on Windows too Thanks!