CPUs that Support 2.8 GHz Frequency of CPU

1Intel Xeon X5660 CPU
2Intel Xeon X5560 CPU
3Intel Xeon X3460 CPU
4Intel Xeon W3530 CPU
5Intel Xeon E7-8891 v4 CPU
6Intel Xeon E7-8891 v3 CPU
7Intel Xeon E7-8890 v2 CPU
8Intel Xeon E7-4890 v2 CPU
9Intel Xeon E7-2890 v2 CPU
10Intel Xeon E5462 CPU
11Intel Xeon E5-2680 v2 CPU
12Intel Xeon E3-1515M v5 CPU