Never used AMD, but used the Ati grphics card, most of software was developed around Cuda & cldnt do anything, until open GL came , hows it in a long run, if the Renders wer long for 3-5 days long, will it hold up ?
Well going for LGA 2011 only, P9X79 E WS has max 64Gb ram
& asus Z9PE D8 WS...