1

Just acquire new dedicated server under debian 8 and check some information about cpu:

$ lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                4
On-line CPU(s) list:   0-3
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 42
Model name:            Intel(R) Core(TM) i3-2130 CPU @ 3.40GHz
Stepping:              7
CPU MHz:               1600.257
BogoMIPS:              6784.70
Virtualization:        VT-x

Model name indicate Intel(R) Core(TM) i3-2130 CPU @ 3.40GHz and CPU MHz indicate 1600.257. Why displayed cpu speed are different ?

2

CPUs can lower their clock speed when not under load to reduce power consumption. See Dynamic Frequency Scaling.

This can be configured or disabled altogether through your operating system (e.g.).

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