Consider three different processors $P1,P2,$ and $P3$ executing the same instruction set:

P$1$ has a $2\mathrm{.}9GHz$ clock rate and a CPI of $1\mathrm{.}5$

P$2$ has a $2\mathrm{.}5GHz$ clock rate and a CPI of $2\mathrm{.}1$

P$3$ has a $4\mathrm{.}0GHz$ clock rate and a CPI of $2\mathrm{.}2$