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[[File:Single v multi.png|thumb|right|620px|Source: https://www.researchgate.net/publication/332614728/figure/fig5/AS:751235892269058@1556120002090/Memory-management-of-single-core-and-multi-core-systems.png]]
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== Usage of Parallel Computing and HPC ==
== How multi core products were marketed ==
=== Developments in the first Multi-Core Processors ===
The death of single-core processors came at the time of the Pentium 4, when, as mentioned above, excessive heat and power consumption became an issue. At this point, multi-core processors such as the Pentium D were introduced. However, Pentium D was not considered a “true” multi-core processor as what is considered today by definition, due to its design of being two separate single-core dies placed beside each other in the same processor package.
The world's first true multi-core processor was called the POWER4, created in 2001 by IBM. It incorporated 2 physical cores on a single CPU die and implemented IBM's PowerPC 64-bit instruction set architecture (ISA). It was used in IBM's line of workstations, servers, and supercomputers at the time, namely the RS/6000 and AS/400 systems.
=== Multi core in server systems ===
