I have done two different ones, so far. The first is (over-) documented here: http://dgack.selfip.com/server/Server2008.php . It works O.K., if a bit slow. The second one is an Intel Atom 330 (with Intel mobo), 2 gigs of ram, etc. It's a 60% faster clock rate, and dual core (with hyperthreading, it looks like 4 cores in Fedora system monitor.) it's a lot healthier. Either one works fine, and can be done for near your target cost. Look at directron.com, and mwave.com for bits and pieces. The Via is rated at about 4 watts, the Intel at about 7, so the power savings are definitely there.
Doug
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I have done two different ones, so far. The first is (over-) documented here: http://dgack.selfip.com/server/Server2008.php . It works O.K., if a bit slow. The second one is an Intel Atom 330 (with Intel mobo), 2 gigs of ram, etc. It's a 60% faster clock rate, and dual core (with hyperthreading, it looks like 4 cores in Fedora system monitor.) it's a lot healthier. Either one works fine, and can be done for near your target cost. Look at directron.com, and mwave.com for bits and pieces. The Via is rated at about 4 watts, the Intel at about 7, so the power savings are definitely there. Doug