Xeon : Computer Hardware Buyers’ Glossary

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Xeon
A line of Intel CPU (Central Processing Unit)s that spans quite a range of performance. The basic ones are a Pentium plus a SIMD (Single Instruction Multiple Data) unit for parallel processing. Unfortunately the Sun Java processors don’t exploit this ability. You would have to write your own code in C and hook it into Java with JNI (Java Native Interface) to make use of it. Some Xeons are 32-bit only, and some also emulate the 64-bit AMD (Advanced Micro Devices) Opteron (or as Intel too embarrassed to admit it now produces clones, calls the EMT64T instruction set). The Opteron 64-bit set is quite different from Intel’s own Itanium 64-bit architecture. Some models support more one core (CPU hardware set) and they often use hyperthreading to simulate even more CPU cores than actually exist.
AMD
Celeron
CPU
hyperthreading
Intel
Itanium
Opteron
Pentium
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