[toyo]

i3 vs i5, from the article:

To begin with, Core i3 series dual-core processors differ from Core i5 in lacking three features: Intel Trusted eXecution Technology (TXT), a set of features that enhance security using hardware-based mechanisms. More on TXT can be read here. The second feature Core i3 lacks is Virtualization Technology for Directed I/O (VT-d), an enhancement to the virtualization capabilities (details here. Core i3 however, does feature VT-x, the regular hardware virtualization features found on today's Intel processors. The third and more relevant feature Core i3 lacks is Turbo Boost technology, a feature that assesses processor load, powers-down one of the two cores, and overclocks the active core, all automatically, and on the fly. This feature holds even more importance in quad-core and multi-socket quad-core machines, but may come handy nonetheless.