"Today we bring you yet another individual motherboard review based on the first dual channel DDR Pentium 4 chipset from SiS; the SiS 655. For more information on our previous individual SiS 655 motherboard reviews, take a look at our MSI 655 Max and Gigabyte SINXP1394 coverage.
So without further ado let's take a look at the ASUS P4SDX Deluxe motherboard, supporting dual channel DDR speeds of up to 400MHz..." http://www.anandtech.com/mb/showdoc.html?i=1786