atx psu question

[hossdaddy]

my buddy has an HP m7470n media centre pc. He wants to upgrade his graphics card(he does have a pci-express x16 slot) But we will need to upgrade his psu. The oem psu is an atx in size. I see that newegg has a few types of atx psu's they have about 80 ATX psu's and 212 ATX12v. Can anyone tell me if these 2 types are the same physical size so that they will fit in his case properly? I am confident that the atx will fit without problem but just trying to get the best value for him. I have selected the following psu for him but wanted to remove all doubt before he orders it.
XClio 500w Good Power $49
http://www.newegg.com/Product/Product.aspx?Item=N82E16817189005

I have selected an HD 3850 256mb for his video card which requires a minimum 450w psu.
He has a budget of around $200. I know this will take him slightly over at around $230 shipped but both units are definitely good buys as far as I can see.

Thanks in advance!

 

[hossdaddy]

anyone? All I really want to know is if there is a physical size difference between an ATX psu and an ATX12V psu?

 

[[Spectre]]

It should be a standard size ATX12v, though I have never seen this particular case open so I can't say what depth the unit will take or any other unusual mounting tabs or fittings that may interfere with installing a different unit.

 

[hossdaddy]

Thnx for the reply Paul. I am 99% sure I have found my answer, and of all places in Craig's List!!!

Cheers