And there's part of the problem. I'm guessing that these are these CPUs, in which case, they're terrible netburst P4s built at 130 nm.
yes, 3.0 HT netbursts, but I'm surprised on the cooling and power requirements (or lack of it) in the DL560.
Quad 3.0's with 6GB DDR and 2x73GB U320 consumes according to my power socket meter approx. 235W (and this from Dual 550W/650W PSU units).
235W isn't a lot.
Cooling is via 8 fans at the front in two rows and with power management software (RHEL5 extensions) the box is very little difference in loudness from a power desktop and I mean that... it simply is a quiet beast - quieter than a single core P4 XEON 2.6 equipped Dell 1750 1U server or a Dual CPU Sun V210 1U.
I know that on the whole 2U are quieter than 1U due to to the constraints in cooling a 1U requiring more powerful fans, but still, it is quiet... and power requirements aren't at all bad.
I'm not sure how an Athlon 64 would outperform overall (computationally and heavy load I/O) a Quad HT box (thats 8x3GHZ HT cores). I'm using most of those cores daily and the box as I said is handling a nice load very well.
For under $200 I assume (for an entire unit) you mean a Dual Core Athlon 64? May be you are right... never tried... 64-bit is tempting though simply because hiphop is a real issue compiling on a 32-bit box and hiphop would be very useful for me at the moment.
Also I'm in the UK, nothing is cheap here, in the US on ebay stuff is often 50% of the UK price... or less....