GunslingerOCS
Vince says it's not the bridge.  It's probably a motherboard PCIe bios setting.

That’s why I told you to investigate the PCI-E lane allocations on your board

Looks like you have to have the cards in slots 1,5,7 for your board. The motherboard also comes with a 3-way bridge for that config.

And it looks like they will cook in the case.. I'd say have a large fan blowing at them with the side panel off.. if you end up keeping the setup long term id say no doubt water cool them.

Wow, that motherboard is whack. Both 3-way bridges aren't high bandwidth. 
 
Note: You'll get higher scores using a high bandwidth bridge. I would suggest using the 100-4w-0042-LR bridge for the 1,5,7 config as the bridge should run at 650 MHz vs the 400 MHz bridges your board ships with.

AHowes
And it looks like they will cook in the case.. I'd say have a large fan blowing at them with the side panel off.. if you end up keeping the setup long term id say no doubt water cool them.

I know you don’t know who he is but rest assured they are not going to be air cooled for long.....

AHowes
And it looks like they will cook in the case.. I'd say have a large fan blowing at them with the side panel off.. if you end up keeping the setup long term id say no doubt water cool them.

I am going to pick on you here - didn'y you see the LN2 pot on the CPU in that picture - test bench rig

Sajin
Wow, that motherboard is whack. Both 3-way bridges aren't high bandwidth. 
Note: You'll get higher scores using a high bandwidth bridge. I would suggest using the 100-4w-0042-LR bridge for 1,5,7 config as the bridge should run at 650 MHz vs the 400 MHz bridges your board ships with.

 
I don't think I've ever seen a HB bridge > 2x SLI
 

CraptacularOne

GunslingerOCS
Vince says it's not the bridge.  It's probably a motherboard PCIe bios setting.

That’s why I told you to investigate the PCI-E lane allocations on your board

 
Been working on it, but I've not found the right combination yet.
 

 

 

Hope you saw my edit on post #24

That's what I thought Gunslinger, its the lanes that's limiting you as it seems there isn't proper support for a 3 lanes with at least 8x going to all of them. 
 
Out of curiosity are you running a PCI-E NVMe? You didn't specify whether or not when I mentioned it the first time. I'm asking again because the board may be pulling 4 lanes from one of your slots to feed the SSD. If so I'd suggest using a regular SATA SSD plugged into one of the SATA headers to test it and see if the lane allocation you need 8x8x8 appears in the bios. 

Sajin
Wow, that motherboard is whack. Both 3-way bridges aren't high bandwidth. 
 
Note: You'll get higher scores using a high bandwidth bridge. I would suggest using the 100-4w-0042-LR bridge for the 1,5,7 config as the bridge should run at 650 MHz vs the 400 MHz bridges your board ships with.

That is because an HB Bridge cannot support 3-Way SLI