Pentium:
A type of microprocessor available in new IBM PC and compatible computers; it is the next step up from the Intel 80486 processor.
Celeron:
A brand name for a line of Intel microprocessors introduced in June, 1998. Celeron chips are based on the same P6 architecture as the Pentium II microprocessor, but are designed for low-cost PCs.
Xeon:
The Xeon is Intel's current generation of server-class microprocessors for PCs. The first Xeon processor was released in 1998 as the Pentium II Xeon.
sa izuzetkom pentium-a, koji se pojavio 1993-e, Celeron i Xeon pripadaju PentiumII, PentiumIII i PentiumIV generacijama procesora, koje su u upotrebi od '98. do danas, tj. hocu da kazem, celeron i xeon su dve od nekoliko popularnih vrsta pentium-a.
PS. Vidim ja da mi bas i ne ide objasnjavanje ovako komplikovane problematike u 2 ujutro. Ako moze neko drugi neka razjasni ovo jednostavnijim recima.
Samo ti sinko (administratore) radi svoj posao.