Power Supply Consumption calculation

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plastiqued

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#1
ASUS A7N8X DELUXE
AMD XP2200+
256 pc2700 sdram
AOpen Geforce4 ti4200
40gig hd
cdrom
cdrw
so anyways im trying to computer the powersupply i need for new system
I have an Enchance Electronics 300W PSU
and i calculated my components as per se the chart in the amd builders' guide.
I'm assuming the XP2200+ has around the same consumption as the XP2100+
and that my Asus A7N8X consumes the same 23.5W as listed in the examples.

PC Components_____ +3.3 Volt__+5.0 Volt__+12.0 Volt_Number_Power
Hard Drive____________________0.80A_____2.00 A_____1_____28
XP 2200+, 1.65 V________________________7.49 A_____1_____ 89.88
RAM(256MBDDR)_______________2.00A_______________1_____20
GeForce 4 Ti4200____6.00 A_____2.00 A_______________1_____29.8
Motherboard________3.00 A_____2.00 A____ 0.30 A_____1_____23.5
CD-RW_______________________1.20 A____0.80 A_____1_____15.6
IEEE 1394_____________________1.60 A______________1_____ 8
USB Devices__________________0.50 A_______________2_____5
Floppy_______________________ 0.80 A_______________1_____4
System Fan___________________0.25 A______________1____3
Processor Fan_________________0.25 A______________1____ 3
PCI Modem_____________________0.50 A________________1____ 2.5
Keyboard____________________0.25A________________1____1.25
Mouse_______________________0.25 A________________1____1.25
Total Power Required = 234.78W
Is this correct?
all i need is 234?
 
#2
Sounds about right. Which means you want a 350W+ PSU. This because:
1. The ratings are often too high, at least on cheaper brands.
2. The wattage on specific voltages (5V, 12V) may not be distributed the same way on a PSU as in this chart.
 

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