A logical core is essentially a non-physical extension of the capabilities of a physical core. With most modern CPU architectures, multi-threading (or hyperthreading, which is Intel's term) allows chips to provide two threads per core - i.e. the same core can work two tasks at once. This doesn't affect performance at all, since this is a built-in feature of most modern architectures. For example, you can purchase up to two physical cores with our SXL (super extra large) VDGS plan, meaning you'd get 4 logical cores, or 4 threads.