Re: Which Processor
Why not a dual core Opteron, i.e the 165? I was convinced after reviewing all the specs between the 64, the x2, and the Opteron. The Opteron clocks a little lower, but that's due to it's server processor nature. They're designed to operate continuously for a VERY long time, so they underclock them. With moderate overclocking you can achieve x2 4200 clock speed EASILY, and have the 1 MB of L2 cache that you can't get unless you buy the x2 4400, that costs a $100.00 more, or the 64 4000+ single core that costs the same.
My vote goes for an Opteron 165