I have the X8DAI motherboard, and two Nvidia GTX 470. They work okay, but no SLI function. How to solve this?
Only a few Intel chipsets (H57, P55, X58) support SLI. Below is a list of the SLI-ready motherboards:
http://www.slizone.com/object/slizone_build_mobo.html
The X8DAi has the Intel 5520 chipset on it. It does not support SLI.