Intel CPU Ranges
-Core - this is Intel's flagship desktop and mobile CPU series. The earliest models (Core Solo and Core Duo ) were laptop-only chips. The Core 2 series introduced desktop versions plus 64-bit and multi-core support. The current range is divided into Core i3, i5, and i7 brands, with i7 representing the best performing models. The Core i range has been based on three microarchitecture, codenamed Nehalem, Sandy Bridge, and lvy Bridge.
-Pentium - the Pentium used to be Intel's premium 32-bit CPU brand and you may still find Pentium 4-based computers in use. The Pentium brand has been reintroduced to represent "mid-range" CPU models based on the Nehalem and Sandy Bridge microarchitectures.