Quad crossfire

Please clarify, I really don't know of a board that support quad Crossfire. Most high end Core i7 boards support Crossfire, some even 3-way. As for connectors some graphics cards have two crossfire ports because they suprt two more cards in 3-way Crossfire, but four?

Any board that supports CF and has 4 PCI-E slots should support quad CF. I'm not sure if the 4770 supports quad CF though.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Yes this motherboard supports QuadFire and it dose come with two crossfire bridges.

http://www.hardspell.com/pic/article/2007/11/19/small/8...
You will need a 3rd bridge to hook up 4 cards in quadfire like so.