Solved What is the wattage of an MSI G31TM-P21 Mother Board?

July 17, 2014 at 15:52:13
Specs: Windows 7
I have an MSI G31TM-P21 Mother Board and I need to know what wattage I need. Do I need 300 Watt, 350 Watt? Someone please let me know. It will have 8GB of ram with a Intel Core 2 Quad Processor.

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July 17, 2014 at 16:15:40
You can figure about 10A@12v for the board and processor. About another 1amp for each drive.

If you use the on board graphics you won't need much amperage. I suggest you buy a good brand PSU with at least 20A on the +12v rail.

If you intend to install an add in PCI 16 graphics card then you will need more. Post your intentions for more precise information.

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July 17, 2014 at 16:28:03
It would be fruitless and kind of tedious to try to add up the maximum load of the motherboard and whatever hypothetical attachments you might have.

You don't need to match your power supply with the exact requirements of the hardware it supports. The hardware will draw what it needs. The power supply just needs to be able to provide it. So let's say you were to add everything up and decide it's going to take 350 watts to power everything. Well then go buy a 500 or 600 watt power supply and you've got it covered. Or better yet why not get that 500 or 600 watt PSU anyway and not bother trying to figure out exact power requirements? Besides you don't want a power supply that provides the minimum needed by your hardware. You want some slack so you won't have to get a new power supply if your hardware changes or maybe as the PSU ages it becomes less capable of providing its rated wattage.

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July 17, 2014 at 16:40:09
✔ Best Answer
Find your CPU on the following list to see how much wattage it requires. Divide the wattage by 12 to find out how much amperage it requires. I'd say OtheHill's "10A@12v for the board and processor" is a pretty fair estimate.

This Corsair 430W PSU is a forum favorite, I have 2 of them myself. You can't beat it for $25 after rebate:

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