Lenovo Thinkpad T61 14.1" widescreen's new features

Always On USB

Battery Stretch

T8100 45nm (Penryn) processor

45nm Hi-K instead of 65nm of Morem CPUs

3MB cache vs 2MB of 1.83GHz T5600, but smaller than 2.0GHz T7200's 4MB cache.

Deep Power Down

SSE 4.1

lower voltage

Dynamic Acceleration Technology

http://www.intel.com/pressroom/archive/releases/20070328fact.htm

http://www.notebookcheck.net/Review-Intel-Core-2-Duo-Penryn-CPUs.7876.0.html

http://www.anandtech.com/cpuchipsets/intel/showdoc.aspx?i=3195&p=1

http://en.wikipedia.org/wiki/SSE4

http://en.wikipedia.org/wiki/Intel_Core_microarchitecture