Speaking generally, lower latency to main memory is better than more cache. On a generation of one platform I dealt with, main memory latency and bandwidth (fa

Speaking generally, lower latency to main memory is better than more cache. On a generation of one platform I dealt with, main memory latency and bandwidth (faster processor design, on-board memory controller, RDRAM) were on par with the L3 cache from the previous platform generation. The cache shrank, and the performance increased.