A Coreboot X220 is exponentially better than a stock X220. On top of a drastically reduced boot time and better battery life, Coreboot allows booting from the E

A Coreboot X220 is exponentially better than a stock X220. On top of a drastically reduced boot time and better battery life, Coreboot allows booting from the ExpressCard, which makes booting from a USB3 possible on the I5 models. Another big plus is that Chromium OS works perfectly on a Coreboot X220, right down to the fully functional built-in SIM modem.