If Turbo Boost Monitor shows a maximum of 1.60Ghz, that can be caused by a few things. The processor utility reads the actual processor frequency once for display during the test, and most likely caught it when it was lowered by the power saving options, by chance. When EIST is enabled, the processor will (should) vary it's frequency depending upon it's load. The reported speed you saw of 0.93GHz is likely the result of power savings options being activated, those being Enhanced Intel Speed Step (EIST) and C-States, used with Mobile as well as Desktop processors. It's standard speed is 1.6GHz, with max Turbo speed of 2.8GHz. The specs for the i7-720QM processor can be seen here:
