The first Core i5 is a version of the earlier Core i7, the Lynnfield core. Lynnfield Core i5 processors have an 8 MB L3 cache. They have a DMI (Direct Media Interface) bus running at 2.5 GT/s. Core i5 also has support for dual-channel DDR SDRAM memory and have Hyper-threading disabled. A new feature called Turbo Boost Technology was introduced which maximizes speed for demanding computer programs. This increases performance to match the amount of work the computer must do.