Multi-core optimization has allowed modern processors to brute force their way through heavier workloads with parallelization. This hasn’t always been the case and still to this day there are software and games that run better on processors with higher single-core performance than multi-core behemoths. Contemporary development will continue to improve multi-core support and performance, but even now it’s still recommended to strongly factor in single-core clock speeds and performance when choosing a CPU for your PC. Here are a few reasons why.