PCIEx speed showing up as 8 lanes? in Processors, Motherboards and Memory Posted November 11, 2005 I've covered this issue before but I'll post it here again. There are two different specs involved. The physical slots are X16. This is simply a measure of the size of the slot. The bandwidth of each slot is X8 lanes. Even though a card may have a physical X16 slot connector, there are no current video cards that can saturate X8 lanes of bandwidth. You will get the full performance from your video card at X8 lanes of bandwidth. But when there is a card that can make use of the x16 bandwidth, this board will not be able to utilize that? I would have to purchase a new board? Second thing then is if I run SLI, both cards will be a x8 right? WHich is what it's supoosed to be?