Memory access on the Apple M1 processor

Re:Memory access on the Apple M1 processor by epistasis on Wednesday January 06, 2021 @02:52PM (#25661450)

> So a good cpu design, just like AMD and Intel have

The design seems to be very different, in that it's far far wider, and supposedly has a much better branch predictor.

> fast ram

Is that a property of the RAM clock, or a function of a better memory controller? The RAM certainly doesn't appear to have any better latency.

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Re:Memory access on the Apple M1 processor by gameswithgo on Wednesday January 06, 2021 @03:14PM (#25661746)

Right, latency isn't (much) affected by a higher clock rate. Getting ram to run fast requires both good ram chips and good controller/motherboard.

and yes, obviously apples bespoke ARM cpu is quite a bit different than Zen3 Ryzens x86 cpu, but I'm not sure it is net-better. When Zen4 hits at 5nm I expect it will perform on par or better than the M1, but we won't know till it happens!

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