Intel Core i5 processor families

Core i5 Mobile family of dual-core microprocessors is based on 0.032 micron Arrandale core, and is built on Westmere (enhanced Nehalem) micro-architecture. The family consists of two lines of microprocessors - i5-4xx and i5-5xx. Both lines incorporate the same basic features, including 3 MB shared level 3 cache, SSE4 instructions, and HyperThreading, Virtualization (VT-x) and Turbo Boost technologies. More expensive i5-5xx line also incorporates VT-d Virtualization, advanced security features (AES new instructions and TXT technology), and is generally clocked higher than Core i5-4xx processors released at the same time frame. Price-wise and performance-wise all Core i5 Mobile processors are positioned between cheaper Core i3 mobile family, and more expensive and powerful Core i7 mobile processors. The i5 mobile family has poorer performance than mobile i7 family due to lower core frequencies, smaller size of level 3 cache, and smaller number of cores, although the i5 processors do include every single technology that is also present in Core i7 mobile CPUs. Mobile Core i5s are packaged either in 988-pin micro-PGA package, or 1288-ball micro-BGA package.