I built myself a new server:
It's made out of these:
AMD Sempron LE-1250
be quiet! Shadow Rock Topflow (fan removed and used as a bottom intake instead)
8GB ECC DDR2
60GB OCZ Vertex 2
2TB Western Digital Caviar Green (WD20EARX) (suspended with some trusty old bicycle inner tubes)
SuperFlower Golden Silent Fanless 550W
A really old case + several cans of spray paint
It is really, really quiet. Even quiter if I disconnect the single fan, but I keep it connected and running at the minimum 280rpm (be quiet!'s web site doesn't have comprehensive specs, but I'm guessing that the fan is nominally 300-1500rpm) for safety. It might actually need the fan if it gets hot in the summer too.
I'm quite impressed with the efficiency of the PSU. Before it arrived, I had everything running off an Antec TruePower 550, and it idled at 47W. When I switched that for the SuperFlower, it went down to 27W
(with only the SSD and no front panel monitor). While the Antec is a few years old now, that's still a massive difference.
You can read a bit more about the server
and its front panel monitor
on my website. If all has gone according to plan, the pages at those links will be served by this very server.