thelivingflesh :
Hello, i need a mobo which can support 4 x asus dc2 r9 280x. these are triple slot cards....will be using them with 4790k.
Thanks
You're looking for a board that supports 4 x triple slot graphics cards? No normal motherboard has 12 expansion slots, so the only way would be to use some flexible x16 PCIe risers on a normal board that supports 4 way crossfire, but you wouldn't be able to mount them in a case or anything; you'd have to fashion some kind of frame to hold the 4 graphics cards. Just Google image search "mining rig" and you'll get the idea.
EDIT: and it goes without saying; if this is for gaming, I wouldn't recommend it.