Gigabyte GA-8N-SLI Quad Royal (nForce4 SLI Intel Edition)
 

Being the first NF4-SLI Intel Edition board from Gigabyte, we were pleased that the board was exceptionally stable. Our ATI Radeon X1800XL and nVidia GeForce 6600GT both work with this NF4 board without any hiccups, nevertheless end-user would probably choose nVidia card to take advantage of SLI technology. You can install up to 4 graphic cards with 8 lanes each and connect up to 8 monitors. For the extreme, you can even fill up the single PCI slot with another graphic card to make it 10!