Hi there, I've recently gone and got myself the parts for a new pc build and needed some advice on gpu spacing in the pci-e slots for an sli setup. Basically, I want to get an hb sli bridge but can't decide if I should be using the two x16 slots for best performance, or using one of the cards in a lower slot to improve cooling between the two. The cpu for my new build is an intel i7 6900k and the mobo is the msi x99 gaming pro carbon. So if I'm right my graphics cards would benefit from both being in x16? The only trouble is the cards I have gone for are the evga 1080ti ftw3 x2 and they are as bulky as hell, leaving very little gap between them when both in x16. Should I get a longer hb sli bridge and drop the second card lower to keep the top card cool? Would this affect performance? Thanks in advance for any help