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Calculating power needs.....?

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by sulmau

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Hi,

I know that the question i'm asking 4 is very typical one & old but I still need to know that how can I exact measure / calculate the power needed in a custom builded system & then purchase the power supply accordingly.........?

Any info /idea / thought...........?

Awaiting helpful reply as always.........

Regards / Sulman

1 reply

by thechas

It will take some digging through technical data, but all you need to do, is add up the power wattages for all of the devices you plan to make part of the system.

If all the mfg provides is voltage and current, you can calculate wattage V*I.
I would then add 25 to 50% for future expansion.

Unless you are planning for a LOT of drives or accessories, 400 to 500 Watts should be sufficient for most needs.

I don't build any systems with less than a 300 Watt supply anymore.

Chas

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