HP 1821-3451 - Intel Pentium Pro processor - 166MHz (P6, 512KB Level-2 cache) - Does not include heat sink Retail
HP 1821-3450 - Intel Pentium Pro processor - 180MHz (P6, 256KB Level-2 cache) - Does not include heat sink Retail
HP 219407-001 - Intel Pentium Pro processor - 200Mhz (512MB Level-2 cache) - Includes heat sink Retail
HP D4975-63000 - Intel Pentium II processor - 266MHz (Klamath, 66MHz front side bus, 512KB Level-2 cache, Slot 1, ECC) - Does not include heat sink Retail
HP 255395-001 - Motherboard (system board), with 512KB Level-2 cache - Includes 200MHz processor and heat sink Retail
HP 219408-001 - Intel Pentium Pro processor - 166Mhz (512MB Level-2 cache) - Includes heat sink Retail
HP 269686-001 - Intel Pentium II processor - 333MHz (Klamath, 66MHz front side bus, 512KB Level-2 cache, Slot 1) - Includes heat sink Retail