PCIE Division

Drew1966

n00b
Joined
Apr 13, 2014
Messages
25
Is it bad to have a motherboard that only has one 16PCIE slot if you have a dual SLI 780ti setup? Because now I'll have the two cards running at 8X
 
S

sonsonate

Guest
Loads of boards have one true 16x (electrical and physical) PCIE slot. The second slot is typically 8x electrical, 16x physical and then when you plug in the 2nd card into the slot, you end up with 8x and 8x -- PCIE 3.0.

What I described is very common on Z77 boards, so don't worry about it.
 

kirbyrj

Fully [H]
Joined
Feb 1, 2005
Messages
29,903
Only way you're going to get something different is to invest in the more expensive x79/x99 (when they come out) boards.
 

Dreamerbydesign

Supreme [H]ardness
Joined
Feb 3, 2008
Messages
5,721
Is it bad to have a motherboard that only has one 16PCIE slot if you have a dual SLI 780ti setup? Because now I'll have the two cards running at 8X

8x @ PCIE 3.0 speeds = 16x @ 2.0. It's plenty enough bandwidth for said video cards.
 

Dan_D

Extremely [H]
Joined
Feb 9, 2002
Messages
60,836
Only way you're going to get something different is to invest in the more expensive x79/x99 (when they come out) boards.

Well you can get a motherboard with a PLX PEX8747 chip on it. Though truth be told they only multiplex the existing lanes into additional lanes. They feed through the same x16 pipe into the CPU. They only really allow for dynamic lane switching and even lane distribution amongst more than two PCIe devices.
 
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