Switch Mode Power Supply

Switch Mode Power Supply commonly known as SMPS is computer hardware used to deliver different amount of power to different other devices in the computer cabinet. This device has different sorts of output cords. Because of these cords it can connect up to every type of device available for the cabinet. The least recommended configuration of SMPS is 300 Watts. But now days there are different denominations available from 400, 450, 500 and even 600 watts rated SMPS are available with suitable price. One must choose a SMPS according to the power consumption of his/her computer hardware. Below given is power consumption chart.

Device Power Consumption (Watts)
Motherboard 25
Floppy drive 5
Keyboard and mouse 3
CPU cooler fan 3
CPU 90-120
Video card 50-120
Memory (per module) 10
Hard drive(per drive) 25
Optical drive (per drive) 25
PCI expansion card (per card) 7
Each USB device (if it draws power from the system) 5
Each FireWire device (if it draws power from the system) 8
Case fans (per fan) 3

Total up of what you have and you will get maximum consumption of your PC cabinet. You would need a power supply that can provide this much of power to your hardware.

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