this post was submitted on 08 May 2024
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It runs at 120 GB/s...
As a Mac user that sounds pretty shit. RAM in a MacBook Pro runs at 400GB/s and that's a CPU which will be obsolete in the next few months, with a new one coming that's expected to be more like 500GB/s.
Sure, modular memory is great. But not if it comes with a performance penalty like that.
Why is bandwidth so important? The M2 is about half as fast as a DDR4 era x86 desktop processor with half the memory bandwidth.
https://www.cpubenchmark.net/compare/5533vs3904vs4922/Apple-M2-Ultra-24-Core-vs-Intel-i9-11900K-vs-Apple-M2-8-Core-3500-MHz
Benchmarks are of course just benchmarks, but the single-core performance is better for the M2, and the range-topping M2 is about 2x faster than the i9.
Also, regardless of how something compares, if it is ever memory-bandwidth bound, then faster RAM should help. While most tasks may be CPU or IO bound, AFAIK there can still easily be memory bound tasks in real-world workloads.
I picked the i9-11900k for comparison since I think that was the last one to only support DDR4 (making it "DDR4 era"). Ryzen maybe faster in the DDR4 era though?
I wouldn't really trust this site. Videos that go through a lot of different benchmarks /programs and games are way better. This shows the M2 being pretty average/normal between other laptop CPUs: https://youtu.be/FWfJq0Y4Oos
And this shows M2 Ultra vs the top Intel CPU at that time: https://youtu.be/buLyy7x2dcQ
The things that's impressive about the M[x] chips are their efficiency. Apple basically lying with the performance graphs they put out is really frustrating when they have an actual amazing metric they could show: power consumption. That's what a RISC architecture is good at
Here is an alternative Piped link(s):
https://piped.video/FWfJq0Y4Oos
https://piped.video/buLyy7x2dcQ
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