CustoMac Mini Deluxe - 550w PSU necessary?

[BigMc22]

Hi guys,

Apologies if I'm being a newb, it's my first build.

I'm looking to put together a CustoMac Mini Deluxe, based off the suggested parts list from March/April.

My question is this: Do I need to get a 550w PSU? When I threw all the parts into a couple of sites, its expected that I'll only be using 330-350 watts.

If there's something I'm missing, I'd be happy to get 550w if it's actually necessary, but is 400w enough wiggle room, as I'm looking to get a nice quiet PSU and the more Watts the more expensive things get.

Again, sorry if I'm missing something glaringly obvious.

 

[trs96]

If your graphics card will be modest in it's power draw then 450W will be enough. The higher rated PSU (550) will leave room for future upgrades with higher end graphics.