Antec P180 Case + P5WD2 Premium Mobo + Which atx PSU standard?

[smsmasters]

I need a PSU for an Antec P180 Case + P5WD2 Premium Mobo + Pentium 4 Dual Core 3 ghz .

Do I need a psu that is atx 2.2 compliant or will a 2.0 compliant psu still work? I'm confused by these atx compliant standards. Can someone please advise.

It's my first time building a computer from scratch.

Cheers for any help!

 

[smsmasters]

What is the difference between 2.01 and 2.2?

Cheers!

 

[smsmasters]

So I can still use a 2.01 or any 2.xx spec PSU with the P5WD2 Premium Mobo + Pentium 4 D 3 ghz?

I just need to clear things up before I go ahead and splash out with my cash.

Cheers everyone!