![]() ![]() ![]() A 2-core CPU can have up to two threads active (one per core) but only one per core. By definition, a single-core CPU can have only one thread active at a time. So a 2-core CPU is very much like having two separate CPUs but is less expensive and can often be faster than two single-core CPUs of the same capability because of the increased communication speed between them, and because they can share common circuitry such as a cache.Ī processor " thread" is an execution sequence active in a processor (core). So to increase processing speed, and to lower manufacturing and end-user costs, individual CPUs were designed to have more than one processing unit (cores) on the chip. This is considerably slower than the speed at which things take place inside the circuitry on the same chip. With two physical CPUs, communication between the CPUs has to go out one CPU socket, across the motherboard support circuitry, and in through the socket of the second CPU. For these, to get two processing units (cores) you must have a motherboard with two separate CPU sockets. ![]() A processor " core" is a physical processing unit on the die (the silicon wafer - the actual chip). ![]()
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