Yes, it is feasible to connect a CPU to a motherboard using a PCI Express bus.
Yes, it is feasible to connect a CPU to a motherboard using a PCI Express bus.
There are fully functional systems built on a secondary board that connect to a main host through PCIe. This approach demands expert tasks and specific software designed for such configurations. For those willing to go further, distributed computing—linking numerous sub-systems to a central controller—is essentially the standard solution, which powers modern supercomputers. Be warned, unconventional methods come at a steep cost.