This shows 240 GB/s using 10 cores (8 performance + 2 efficiency) and 224 GB/s with 8 cores (as you'd most likely run HPC apps). Good, but far from the theoretical 400 GB/s headline.
https://www.anandtech.com/show/17024/apple-m1-max-performance-review/2 Barry Smith <[email protected]> writes: > Thanks, presumably we'll see the new Mac's there in a few days. BTW: the > old streams benchmark page should point to this site; google is worthless. > > I get 24 on my Intel MacBook Pro and it also saturates with 1 core. > > Barry > > >> On Oct 18, 2021, at 4:48 PM, Jed Brown <[email protected]> wrote: >> >> I don't have one, but this suggests it gets about 40 GB/s and can be >> saturated by a single core. I believe it uses two channels of LPDDR4X-4266, >> which has a theoretical peak of 68 GB/s. >> >> https://browser.geekbench.com/v3/cpu/8931693 >> >> The press release claims up to 400 GB/s on the Max using DDR5. I assume >> that's calculated based on 8 channels of LPDDR5-6400, which seems like a >> surprisingly big step and I'm skeptical of what will actually be realized. >> >> Barry Smith <[email protected]> writes: >> >>> Can anyone who owns an Apple M1 system run the MPI streams benchmark? >>> Make sure the -O3 (or something) optimization flags are turned on. >>> >>> Thanks >>> >>> Barry
