2x6890. Do i need a motherboard with Quad Crossfirex?

[lovet801]

Hello,
If i have 2 radeon 6890 video cards, do i need a motherboard with quad crossfire support? or will dual crossfire support work?

Also, should all the buses be running at 16x? because one of mine is only running at 4x for some reason. Thank you.

 

[iam2thecrowe]

if your board has 1 16x slot and the other 16x slot runs at 4x then avoid crossfire, it will work but the results will be disappointing, stuttering, fps drops etc. bot for 2 cards you need dual crossfire support, not quad.

 

[Rockdpm]

Does your board have 4 PCI-e lanes?

 

[lovet801]

I have a Gigabyte GA-MA790FX-DS5 motherboard. It supports dual crossfire. i currently have 2 radeon 4870x2 installed, things seem to run just fine, but i am wondering if i am capping my PCI-e lanes because the motherboard does not have quad crossfire support?

 

[Rockdpm]

I wouldn't recommend you buy two 690's.. your bottlenecking your system.. if you have a AMD board.. i dont care what CPU you got from AMD.. its a bottleneck