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Can you get better performance from a dual-core system or a dual-processor system? This article evaluates the two configurations and determines that multi-core chips tend to be more efficient than multi-CPU systems.

Published: 25 Jun 2007

Multi-core chips tend to be more efficient than multi-CPU systems. Another benefit of multi-core systems is that having only a single CPU keeps system board prices low since there is only a need for one CPU socket and the corresponding hardware that facilitates its use.

Today nearly every computer on the market contains a processor with at least two cores, while every server sold today has at least two cores (some have four). The longstanding question of whether or not you should buy a dual-core system isn’t even an issue anymore because practically every modern system supports two or more cores. But what’s the difference is between a dual-core system and a system with two physical processors? Which configuration offers better performance?

Before I can explain these differences, you should understand that having two processors does not double a machine’s performance. There are two main reasons for this.

Even more performance is lost to communications occurring between processors. For multiple processors to work cooperatively, the two processors must be able to communicate with each other. Imagine what would happen if two processors tried to apply conflicting changes to the same memory location at the same time. To prevent this type of…

This is an extract of 300 words from the original article.
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