But this is a CPU for the data center
For a gaming PC today, you can buy a 16-core Ryzen 9 or even a 24-core Core i9. With a strong desire, you can assemble a gaming system based on a 64-core Ryzen Threadripper. Ampere Computing has made it possible to build a gaming system on a 192-core Arm processor.
Ampere Computing published instructions for running Steam on its CPU
The company has published a guide on how to install Steam (under Linux) on a system with its CPU. The description provides an example of using a system with such a processor and an Nvidia RTX A6000 accelerator.
Of course, simply taking and assembling such a PC simply will not work, since Ampere processors are focused on the data center and are not sold at retail.