Need an ultra small power supply

[pawn]

I'm building a PC inside the casing of an NES and need a really small power supply. I'm not really sure if what I need exists or not, though.

Here are the specs of my PC:
H77M-ITX motherboard
Core i5 3570K 3.4GHz LGA 1155 Processor
OCZ Vertex 3 SSD
8 GB RAM (2 4gb sticks)

I know that the above will work on a 300w PSU that I tried, but it's too big to fit in the case. If at all possible, I'd like to find a DC-DC PSU that can handle the above components comfortably but in my own research, I didn't find anything as big as 300w, and I don't know how small I can go.

Has anyone done a build like mine and already figured out what works? If so, I'd love to know before randomly buying something.

 

[Smoblikat]

Why get a 3570K, why not a 3550? You clearly wont be OCing on that small of a PSU. the xbox 1 PSU was fairly small and i think it was 250w, or maybe im thinking of somthing else.

 

[pawn]

Why get a 3570K, why not a 3550? You clearly wont be OCing on that small of a PSU. the xbox 1 PSU was fairly small and i think it was 250w, or maybe im thinking of somthing else.

I got the 3570k because I wasn't really sure how limited I may or may not be regarding power and heat. I can always under-clock if I absolutely have to, but I want the PC to be as competent as I can get away with. I've seen a lot of NES PCs online with weaker specs, but I wanted to try my hand at building one with decent stats.

I hadn't considered using an Xbox PSU though. I have an old Xbox that I could open up. Will look into that. Thanks!

 

[Zap]

A PicoPSU 150XT or 160XT would work great. Those are the 24-pin versions. The "kits" start at 105W power brick, which should be enough for your proposed rig (stock clocked Ivy Bridge quad core, SSD, nothing else).

 

[thelastjuju]

Sounds like a sweet idea.. any pics of the progress?

 

[pawn]

Don't have any yet, but will take some when I get home.

 

[Broheim]

do you have some rough maximum measurements for the psu? shuttle makes some quite small powersupplies that might fit.

 

[pawn]

Sorry that I haven't posted pics like I promised yet. Been busy going to kids' ball games over the past week. I did go ahead and get the Pico PSU 160XT with the 192W brick. And I'm happy to report that it works like a charm! Thanks for the suggestions everyone, and whenever I do get some pics to show off, I'll be sure to post them.