The P4S8X , A7V8X and A7N8X are based on SiS’ 648, VIA’s KT400 and NVIDIA’s latest chipset, respectively. One of the main features of these motherboards is the advanced Serial ATA storage interface. Different from the traditional Parallel ATA, Serial ATA offers lower voltage (500milivolts peak to peak), thinner and longer cables, lower pin counts, simpler cable routing and smaller connectors for smaller form factor design, system stability and robust data transfer at 150MB/s. They also have AGP 8x.