after learning little on how computer programs run had thoughts concerning cpu , ram. after watching few youtube videos (linus tech tips , others) seem show increasing ram speed (frequency) not have of performance improvement in real world applications , games on general desktop computer. first question why this? because of high hit rates (95% , above) of cpu's cache on modern cpus? in turn lead less , less need cpu reach out ram? also, in situations faster ram frequency beneficial?
note: broad question, , answers can vary differently depending on architecture/os running system. answering best-judgement standpoint on how these things work
- why there not larger performance difference between different ram clock speeds?
i imagine clock speed of ram of computer matters less clock speed of cpu cache. because:
- the cpu gets instructions cache, not straight ram
- with larger cache sizes of modern cpu's, less necessary need go out ram often.
- when cache needs go out ram, uses asynchronous processor (dma) grab more information, allowing cpu switch different process entirely.
besides that, clock speed of motherboard's various pipelines (dma) creating chokepoint slowing transfer rate of information overall.
which situations faster ram frequency beneficial?
i overall, 1 of core pieces of hardware involved memory , use , transfer (cpu, cpu cache, various memory pipelines, various memory transfer devices (dma, etc.), ram itself) can cause chokepoint faster ram might or might not affect overall performance. by-case issue.
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