If you want to get info about your system's BIOS, then type this
command
wmic bios get name,serialnumber,version
This will tells you the name if your BIOS, current version and
it's serial number if there is any.
wmic csproduct get name,identifyingnumber,uuid
This command will tell you the system motherboard (that happen
to be the name) and it's UUID
wmic cpu get name,CurrentClockSpeed,MaxClockSpeed
If you want to quickly find out what's the CPU clock speed, you
can do the following, also if you have turbo boost CPUs you can
find out what's the Max Clock Speed your system is capable of for
the current configuration. Of course you can always overclock your
CPU and that will too reflect the change.
wmic cpu get name,CurrentClockSpeed,MaxClockSpeed /every:1