And the Threadripper CPU costs more than a GPU which can give you more than 2$ per day, why the heck are people building CPU mining rigs? They aren't worth it to begin with, GPUs all the way
Trolling?
People aren't building CPU mining rigs, they're building mining rigs that include a CPU also capable of mining.
The only cost is the incremental cost of a bigger CPU.
Regarding the performance of the Xeon quartet I expect it would underperform the TR-3970X due to a lower clock
rate. Also need to consider that a 4 CPU system does not perform nearly as well as 4 seperate systems.
They're also a pain to maintain unless you're an experienced systems admin.
These systems only existed because CPUs couldn't keep up with processing demand, similar to SLI & Crossfire for GPUs.
All of them are essentially obsolete now. Desktop CPUs now have 64 cores and GPUs can now do 8K gaming.