beyond was released back in 2004 and only requires a Pentium 4. Multicore CPUs didn't exist in the consumer market back then, so the game doesn't benefit from them at all.

​Additionally, server CPUs are designed with hypervisors and parallel workloads in mind rather than gaming. Since modern game engines are rarely optimized for massive parallel processing, your Xeon unfortunately combines terrible single-core performance with a high TDP of 185W.