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PSUs standard size?

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Purchased a new computer case - the CoolerMaster Cosmos 1000 - and moved everything from my old case to the new one. Everything was fine and dandy until I tried moving over the power supply. It's simply too big to fit in the space of that enormous case. Until now, I thought all power supply units were the same size (except the ones used in desktops).

The only thing I have noticed is that my current power supply has a fan on the front of the box, not the top or bottom. If I purchase a PSU with a fan on the top or bottom, is it safe to assume it'll fit the hole?

The current PSU is coming out of an Alienware case. The only thing stock in that case was the power supply and the ROM drive. All other parts, including the motherboard, have been replaced over the last two years.

While shopping for PSUs online, I don't see dimensions for these things so I have to believe it's standardized, right?

Any information will be greatly appreciated. I hate to blow $130 on a PSU and find it doesn't fit the hole either. When looking at reviews for this case, NO ONE has complained about getting their PSU in this case so I assume Alienware used some fenangled box instead of the standard size.


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    Tech Staff

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A standard design for components is the ATX standard. I don't know about the Alienware, but find any ATX power supply and it should fit.

If what you are saying is true, shame on Alienware!
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