Multiple CPU's in a single PC, is it possible?
Well, as it turns out, having multiple CPU's in a PC has been done before. I fact, it was a relatively common practice in PC's in the 90s. However, not necessarily for the home computer, but more for computers that required much higher processing power. The CPU's of the time were only single cores and were extremely expensive. One of the most popular units was the single-core 486 by Intel which at the time cost around $1,000.
Nowadays, CPU's aren't necessarily cheap either but, in comparison, we have multiple core CPU's that are far more powerful and are still usually cheaper than the $1,000 mark.
But how relevant are multiple CPU PC setups today? Well, not really. The top of the line CPU you can get now offers up to 64 cores, such as the AMD Threadripper 3990X. And with that much processing power, there are not many programs and or games that require even close to that amount. This, in return, renders the concept of multiple CPU's redundant.
Take a look at the video below by YouTube channel, Linus Tech Tips, on Should You Put Two CPU's In Your PC?