More than 6

(only counting in actual use)
(1) Main Surfing box = 1.5gig P4 (Compaq)
(2) Test Bed box = 1.2gig Amd Tbird (Asus A7V133)
(3) Webserver1 = Dual P3 850's (Abit VP6)
(4) Webserver2 = Dual Celeron 366's (Abit BP6)
(5) Webserver3 = 1.0 gig Amd Tbird (Asus A7V)
(6) Domain Controller = Dual P2 450's (dell)
(7) Name server1 = P2 450 (Dual capable but lost a CPU last week

) (dell)
(8) Name server2 = P2 266 (Sony)
(9) Webserver4 = AMD Xp 1800+ (MSI KT3 Ultra-ARU)
all of the above are for my business/personal use.
Family systems are:
(10) Wife's = P3 600 (Asus CUVX)
(11 Son's = P3 800 (Eupa IBB)
(12) Daughters = P3 1gig (dell)
All of the non "custom built" machines are one's I bought from Auctions or are Customer trade-in's that I put to good use
*edited to update* 3-20-2002