PC Power Supply Ratings

[Oldskool]

When purchasing a motherboard and PC power supply, is the wattage a factor?

In other words, can I use any ATX power supply (300 / 400 / 500 watts) with any ATX motherboard?

I'm going to purchase the parts separately.

Thanks.

[SirPeale]

The power supply is one of the most important parts of any computers system.  DON'T SKIMP!

When talking about the wattage, it really depends on how many devices you have attached.  If you have only one hard drive and a CD drive, 300-350 is plenty.

Now, when it comes to the higher end systems, you want to make sure there are enough amps to power your new system.  The more amps, the better off you are.  This should be disclosed in any decent power supply's specs.

Also make sure the efficiency rating is at least 70% or higher, or darn close to 70%.

[Oldskool]

Peale, I think you may have missed the question.

I do plan on buying a good beefy power supply, but I don't want to get one that may be too much for the mobo.

Can any ATX power supply be used with any ATX motherboard, or will the mobo manual specify a range of acceptable wattages?

[SirPeale]

Nope, didn't miss the question.  Any power supply will do, but make sure you don't get a cheap crap PS!  I mean one of those Deer PSs or something for like $15 for a 550 watt.  Get this one:

http://www.newegg.com/app/ViewProductDesc.asp?description=17-103-908&catalog=58&manufactory=BROWSE&depa=1

Getting a cheap power supply is just asking for trouble.