Yahoo.com.tw 可以查到計算方式

好像是
power body x watt
board body x w
CPU xx w
Ram xx w
CDRW xx w
DVDRW xx w
HD1 xx w
HD2 xx w
Flopy x w
Graphic xx w
PCI 1 x w
PCI 2 x w
USB1 xx w
USB2 xx w
Fan 1 x w
Fan 2 x w
Fan 3 x w
Panel x w
----------------------
Total xxx watt
SUM = total / 80% e.g. 380 watt / 0.8 = 475 watt