Z8NA-D6 is designed in ATX form factor, namely 12" x 9.6", which is the first slim size dual processor server & workstation motherboard in the market & can be fitted in your desktop PC chassis for cost-effective use. Z8NA-D6 is built with 24+8pin power connector to support both SSI & ATX power supply, the former is suitable for best performance & expandability use, & the latter for cost effective usage, whose price is much lower than that of SSI power supply.