The unit is a minor step up from the T9400, which is almost identical in features but is slightly slower, at 2.53 GHz. Although Intel planned to keep T-series TDP values under 30 W, this unit has a TDP of 35 W. To older Centrino models, the T9550 adds SSE4.1 support and a higher front side bus speed of 1066 MHz. After a short delay, Montevina CPUs were released in July 2008. This unit is unavailable at retail.