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Latest zen4 is very competitive power wise with M2, M2 still has the crown,but laptop battery life is dominated by other parts of the system when you're down to
by tails4e 3y ago
Latest zen4 is very competitive power wise with M2, M2 still has the crown,but laptop battery life is dominated by other parts of the system when you're down to 1 to 2 W of cpu power for light workloads.
- paulmd 3y agoonly in cinebench or other dense math workloads afaik (especially ones that don't use vector extensions on ARM). SPEC benchmarks have M1 Max demolishing x86 in a lot of real-world applications. Similarly, in things like CFD the M2 Ultra absolutely demolishes server processors let alone laptops. https://images.anandtech.com/graphs/graph17024/117494.png https://images.anandtech.com/graphs/graph17024/117494.png https://images.anandtech.com/graphs/graph17024/117495.png https://images.anandtech.com/graphs/graph17024/117495.png http://hrtapps.com/blogs/20220427/ http://hrtapps.com/blogs/20220427/ cinebench really just tests one thing, arithmetic intensity, and it doesn't represent cache performance, branching, reordering, or anything else in a processor. but those are actually quite important to real workloads. let's look at perf/w for, let's say gcc (chrome compiles?) or PGBench or something besides cinebench and see how the picture looks then.
- flamedoge 3y agoWould you say x86 is held back by lack of scalable vector processing, limited to AVX512? ARM must be doing something better power efficiency and parallel processing, that x86 was too complacent in.
- tails4e 3y agoThose charts are at 35w for the Ryzen, so calling that a comparison with a server class processor is a stretch. I don't see the power of the M2 in those benchmarks, do you know what it was for reference?
- elabajaba 3y agoAll those charts are showing older x86 CPUs (on worse nodes), and don't contain any Zen 4 CPUs.