Im looking to get a GTX 470 for use with DaVinci Resolve. There are used pre-flashed ones on ebay but I'd rather buy a new card for almost 1/2 the price and flash it myself. http://cgi.ebay.com/Nvidia-GTX-470-...eo_TV_Cards&hash=item5ae1e3e592#ht_2677wt_907 I'm having trouble finding a guide for how to do it on a Mac Pro. Any ideas? Thanks!