does 400W power fit the PC ?

MST Quard Q8400 2.5Ghz 4MB Computer
-Gigabit LAN, PCI x2, PCI-E, USB 2.0 x8
-INTEL CORE 2 QUAD 2.66 Q8400 4M 1333MHz CPU
-KINGSTON 4GB(2GB X 2) 1333MHZ DDR3 NON-ECC CL9 DIMM
-FOXCONN G41MXE CHIPSET LGA775 DDR3 MAINBOARD
-LG GH22NS50 BLACK INTERNAL SUPER MULTI DVD-RW SATA
-WD CAVIAR GREENPOWER SATA 32M CACHE 500G HDD
-Delta SERVERPOWER 400 W
-GALAXY GEFORCE GTX260+ADDA SINGLE W/896MB PCIE