My nicks for dual CPU:
Amat0r (with zero)
Ace of Chess
<amator>

My dual CPU computer: (all parts from newegg.com)
motherboard – K7D Master-L from MSI – $200
can be overclocked, but I did not try it, OK I tried but it didn’t work
2 processors AMD2600MP – 2x$200=$400 (not overclocked)
standard memory 2x512MB (1GB total) unregistered – 2 x $65 = $130
motherboard says “registered memory only” which is more expensive,
but you may use not-registered, maximum for not-registered is 2x512MB=1GB
ANTEC Model SX1040BII () – $100
400W power supply, network card, and sound card built-in
old hard drive
old cd-rom
old video card

My single CPU computer:
most of the time – AMD2400XP not overclocked with 512MB RAM ($250 computer)
sometimes I use different computers like Intel P4 2400MHz or Intel P4 2000MHz