The X3D chips have an absolutely ridiculous amount of L3 cache, so when your workload fits largely in L3 they have far, far more memory bandwidth than any other

The X3D chips have an absolutely ridiculous amount of L3 cache, so when your workload fits largely in L3 they have far, far more memory bandwidth than any other option on the market. That's the case pretty often, especially for games, hence the workload specificity. The X3D cache system means some workloads are 50% faster and some are 20% slower, so workload really does matter.