CPU Cores

The Central Processing Unit (or CPU) is what allows your PC to perform tasks through applications and provides instructions that deliver information stored to RAM (random access memory).
A CPU that offers multiple Cores may perform significantly better than a single-core CPU of the same speed. Multiple Cores allow PCs to run multiple processes at the same time with greater ease, increasing your performance when multitasking or under the demands of powerful apps and programs.
The main difference between CPU and Core is that the CPU is an electronic circuit inside the computer that carries out instruction to perform arithmetic, logical, control and input/output operations while the core is an execution unit inside the CPU that receives and executes instructions.