Thinkpads Forum

http://processorfinder.intel.com/detail ... Spec=SL5YU

or

http://processorfinder.intel.com/detail ... Spec=SL6CG

The specs are nearly the same but there is one noticeable difference under the notes section. Other than that I can't tell.

SL5YU supports speedstep, the other does not ... which means the SL5YU will have better battery life in comparison (and lesser heat since the processor can clock down when system is idle).

Thanks Gator. I find it strange that both of those were offered in the A31.