dEAne :
You mean this board GA-X58A-UD7?. Yeah I believe that better performance comes when the cards can sli/xfire with the full 16x,16x thats what I usually looking for a mobo. Well for me it is possible for a x58 to have hybrid fusion gpu capability - so lots of changes to the mobo required to do this.
No thats not the one.... This is like all X58 boards Crossfire AND SLI compatible, but all the gpus while in SLI or Crossfire must be from either ATi or Nvidia only, for example if you want SLI, you will need to use 1Nvidia Card + 1 Nvidia Card, what I am asking is actually much more intricate;
Is there an X58 board that has the same fusion/hybrid gpu configurations as the P55 fusion board? Meaning I can combine a Sapphire ATi Radeon card in either SLI or Crossfire WITH a FERMI GTX470? There is a P55 or H55 board that can do just this but I know those boards are limited to 8X8X configs when in SLI or Crossfire, if it were an X58, both 16X lanes could be used for a crazy setup!