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Old 05-19-2012, 07:15 AM   #9
Daemon Poster
Join Date: Feb 2012
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Posts: 699
Default Re: Power Usage Question


This guide will give you an idea as to what capacity Power Supply you will require when building your own or upgrading your PC.

Add up the power needs of all your components of your computer to find out what size PSU you need.
Aim for around 50-70% of total capacity which should still leave room for upgrade expansion.

A small board for compact PC's 25W
An average Desktop motherboard 35W
A high end motherboard 50W

Core 2 Duo 8xxx 65W
Core 2 Duo 9xxx 95W
Core 2 Quad 95W
Core 2 Duo Extreme 150W
Core I3 75W
core I5 95W
Core I7-8xx 95W
Core I7-9xx 130W

Athlon II X2 'e' 45w
athlon II X2 65W
Athlon II X3 45W
Athlon II X4 95W
Phenom II X2 80W
Phenom II X3 95W
Phenom II X4 X6 140w

Graphics card
AGP or lesser with no extra power 50W
PCI-E with no seperate power supply 75W
PCI_E with 6 pin connector 150W
PCI-E with two 6 pin connector 225W
PCI-E with 8 pin connector 225W
PCI-E with 8 pin and 6 pin connector 300W

Single stick of DDR 6W
Two sticks of DDR 12W
Four sticks of DDR 24W
Two sticks of DDR2 8w
Four sticks of DDR2 16w
Two sticks DDR3 6W
Four sticks DDR3 12w
Six sticks of DDR3 18w

Fans 5w to 10W

Optical Drives 10W

IDE Hard Drives 15W

SATA Hard Drives 10W

Solid State Hard Drives 10W

As mentioned it will give you an idea of your power supply requirements

Brand name Power supplies your choice.
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