ATX power supply question

[beezelbubba]

I have this old Aopen computer case(one of those horizontal ones,HX95 I believe) that I've been running a 1.1 gig Duron in with no issues.It has a 235 watt Aopen power supply.
I just bought a Jetway Athlon 939 with an Athlon 64 3200+.The mobo manual says you should use a minimum of 350 watt PSU.I plan on buying a 400 watt, but my question is this:Will any ATX power supply fit in any ATX case?Is it a univeral standard?
Power supply
The case
The mobo

 

[Ford Van]

Yes. I have never heard anything otherwise.

 

[bigwillz24]

Unless it's a blade server or something like that, it will fit.

 

[RWhite]

Yes, any ATX power supply will fit. But not all ATX power supplies are created equal.

The newer ATX power supplies have an additional wire coming from them, a 4 pin jack. Its required on newer P4 motherboards. An older ATX power supply will not have it.

 

[beezelbubba]

Yes, any ATX power supply will fit. But not all ATX power supplies are created equal.

The newer ATX power supplies have an additional wire coming from them, a 4 pin jack. Its required on newer P4 motherboards. An older ATX power supply will not have it.

That being the 24 pin connector rather than the 20 pin?

 

[altitude909]

Yeah, remember that there are ATX and ATX2 power supplies out there. ATX2 will be backwards compatible with the long power connector that you can break the end off of to fit older mother boards. Both should fit any atx case though