The only reason you would want to change the motherboard is if you want the possibility to go crossfire. Changing the board alone does not speed up the system.
I never said it was due to a sluggish system.
My current board wont post and after several days of trying to diagnose the problem I have decided a new board is the way to go.
I have tested all of the other hardware on a different build and found that it is in fact the motherboard.