The "180MHz" setting is a struggle. I can't figure out if it is actually 180MHz (ratio 10/9) or 183MHz (12/11). cpuz assumes it is 183MHz.
In this case, 11x12/11 = 12 -> CPU/12
If it is 10/9 : 11x10/9 = 12,2 -> CPU/13

Only a memory bandwidth test would tell.