If I try to boot with my x1900xt in the main PCI-E orange slot then the pc powers on but there is no picture. I still get the 3 beeps I always do warning me I have no cpu fan ( as im on water ) so its as if the pc is booting up.

It boots fine when using the lower black slot which i prefer anyway as i have more room there but I think the black slot is only 8x where as the orange is 16x. Also if the board is faulty I will want to RMA


Any one else tried the above combo without any problem ?