Lot of 4 Processor Intel.. The Intel Pentium 4 2.80 GHz desktop processor built on the LGA 775 socket. Clock Speed: 2.80 GHz L2 Cache: 1 MB Bus Speed (FSB): 800 MHz Socket Type: LGA 775.. Intel Pentium III 933/256/133/1.75 Clock Speed: 933 MHzL2 Cache: 256 KBBus Speed (FSB): 133 MHzCore Voltage: 1.75V (some variants operate at 1.7V)Socket Type: Socket 370.. Intel Pentium 4 processor 3.4 GHz NetBurst architecture desktop CPU with 1 MB of L2 cache Clock Speed: 3.4 GHz (often referred to as ~3.40 GHz)L2 Cache: 1 MBCore Codename: Prescott (90 nm process) or Northwood (130 nm process, though 3.4 GHz Northwood models typically have 512 KB L2 cache, meaning a 1M variant points to the Prescott family or specific 1M iterations)Bus Speed: 800 MHz Front Side Bus (FSB)