Interestingly, Broadwell-S and Broadwell-R did this using the "Crystal Well" L4 cache. However, DDR4 memory now provides more bandwidth than the L4 could (alth

Interestingly, Broadwell-S and Broadwell-R did this using the "Crystal Well" L4 cache. However, DDR4 memory now provides more bandwidth than the L4 could (although probably at a higher latency).