Is 4 the maximum number of GPUs this board will support?

[dtrue92]

Or can I do something to make it work with 5 or 6.
Heres the board http://www.newegg.com/Product/Product.aspx?Item=N82E16813157262

 

[lewisaro1]

you can only use a maximum of 4 gpu's, you will see diminishing returns greatly after the 3rd GPU
this motherboard has 3 16x and one 1x so there would be no point in a fourth GPU but it would support 3 if you really wanted to do it

 

[Wolfshadw]

That depends entirely on the number of PCI-E lanes and how they're distributed. Assuming you're using risers and PCI-Ex1 to PCI-Ex16 adapters, you could, in theory, install up to five graphic cards.

-Wolf sends

 

[ShadyHamster]

You could possibly get 5 cards running on that board with pci-e risers.
Compatibility is not always 100% once you start adding so many cards.
That board has no extra power (think molex connector or even sata power on the board) to power extra cards so i would say you would run into problems trying to run so many cards from that board.