The common activity of the processor cores is called multitasking. In multi-core processors, good cooperation between the cores is important, as it allows for the maximum use of the entire system. Generally, multi-core processors are often used for virtualization or computations, while processors with fewer cores and the highest possible clock rate are often used for performance-intensive applications with a single thread.

CPU threads are used by Hyperthreading and Multi-threading technologies, which create two virtual cores from one physical core by activating two controllers in the core to ensure higher performance. Most modern server processors have a ratio of 1:2, e.g. 8 cores, 16 threads.

The frequency or clock rate of a processor indicates how quickly the processor can process instructions, sort units, and zeros. Performance usually increases as the frequency of the processor increases, but this is not always the case. Multi-core processors tend to have a lower clock rate, but they still perform better in optimized programs. Therefore, it is only one aspect of choosing the right processor for a specific application.

The cache memory exists in three levels, L1, L2, and L3, and is a hardware cache used by the processor to store data, making subsequent data access faster. Processors with more cores often have larger cache memory. AMD EPYC processors excel in this area, offering up to 256 MB of L3 cache memory.

This price represents the maximum thermal power that the server cooling must be able to dissipate. For processors, the heat lost is almost equal to the energy consumed.