This mostly applies if the CPU is running at quite a high temperature already. Otherwise 5 degrees might be 50 or 25 MHz only. It may also not matter too much given that X4 loads a few cores so will be pushing down the boost frequency significantly from that. This may also vary from core to core as some cores are faster than others. I do agree that it is kind of a mess for consistent benchmarks.Toombstone wrote: ↑Fri, 15. May 20, 23:15for ryzen users even ambient temps matter ... 5 degrees means 100mhz less turbo boost (ryzen is extremely temp sensitive)
It really depends on workload. As some people have posted in this thread, it can make a significant difference. Generally as core performance goes up, memory performance has to as well in order to keep the core continuously fed with data. It will make a more significant difference with Zen2 but it still does matter for Intel, especially with their modern high core count high clock speed parts. This is one of the reasons why traditionally high core count CPUs used 3 or more channel memory configurations, with modern server CPUs like Zen2 based EPYC using as may as 8 memory channels to feed their 64 cores.
This is also one of the driving factors behind migrating to use DDR5. With current dual channel DDR4 consumer CPUs the memory performance is increasingly becoming a limit to their performance requiring the use of larger CPU caches, higher transfer rates and tighter timing to work around. DDR5 should buy another major stepping stone for CPU performance by doubling channel numbers and overall doubling transfer speed per DIMM.