Some other settings...
CPU Multiplier: 6
Bus speed: 266
Which gives a core speed of 1.6 Ghz (why isn't this 1.86 Mhz?)
I am thinking this is the power savings of the CPU, try running a program and then running CPU-Z. I am pretty sure it will then show 1.86. My e6300 is OC'd but in idle/power savings it also shows 1.6