4 x 3 GHz & 4 x 1.9 GHz (Microsoft SQ1)
4 x 3.15 GHz & 4 x 1.8 GHz (Microsoft SQ2)
The CPU speed indicates how many processing cycles per second can be executed by a CPU, considering all of its cores (processing units). It is calculated by adding the clock rates of each core or, in the case of multi-core processors employing different microarchitectures, of each group of cores.
CPU speed: is this important to you?