Hi,
Why are you quoting your laptop temps as a comparison? It makes no sense.
The Intel E5 2670 was first launched in 2012 and some versions are in "end of life" status. Modern Intel i7 processors depending on the tasks will be superior compared to the the early version of the E5 2670 XEON.
If the GPU in your work station doesn't handle video correctly then the processors will be used for off loading tasks.
There are different versions of the Intel E5 2670 and yours could be at the bottom of the barrel compared to the v3.
You should be able to use Windows 10 performance monitor to ensure that all processors and threads are correctly working.
Depending on the installed dimms, the 1,333 version in your workstation might not be the load reduction dimms.