Power supply running on 12V DC

polarity

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Mar 9, 2003
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Try mini-itx.com. They're more for in car or HTPC though, so the power might not be as high as for a full desktop, just 120W.

Alternatively you can just buy a 12VDC-110/240VAC inverter and run any computer off it, although for PC use you'll want one with a good sine wave AC output, as computer's don't run reliably on the poorer quality ones.