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I'm using 8-channel DDR4-3200. Would I get any benefit from 4-channel DDR5-5xxx? Is 8-channel DDR4-3200 roughly equivalent to 4-channel DDR4-6400, or am I missi
by jquery 5y ago
I'm using 8-channel DDR4-3200. Would I get any benefit from 4-channel DDR5-5xxx? Is 8-channel DDR4-3200 roughly equivalent to 4-channel DDR4-6400, or am I missing something?
- InvaderFizz 5y agoYou're not missing much. Alder Lake (2ch DDR5-4800) achieved pretty impressive memory bandwidth, but it is still eclipsed by 4ch DDR4-3200 on Threadripper. If you could get 2ch DDR5-6400, it would be the same bandwidth as the TR4. What I don't understand well enough to know the impacts, is how latency plays into specific workloads. 2ch Alder lake is about 70GB/s[0] 4ch Threadripper is about 85GB/s 8ch/64c Threadripper Pro/Epyc is about 140GB/s[1] 0: https://hothardware.com/reviews/intel-12th-gen-core-alder-lake-cpu-review?page=2 https://hothardware.com/reviews/intel-12th-gen-core-alder-la... 1: https://www.anandtech.com/show/16805/amd-threadripper-pro-review-an-upgrade-over-regular-threadripper/8 https://www.anandtech.com/show/16805/amd-threadripper-pro-re...