CPU ST Performance: Not Much Change from M1

Apple didn’t talk much about core performance of the new M1 Pro and Max, and this is likely because it hasn’t really changed all that much compared to the M1. We’re still seeing the same Firestrom performance cores, and they’re still clocked at 3.23GHz. The new chip has more caches, and more DRAM bandwidth, but under ST scenarios we’re not expecting large differences.

When we first tested the M1 last year, we had compiled SPEC under Apple’s Xcode compiler, and we lacked a Fortran compiler. We’ve moved onto a vanilla LLVM11 toolchain and making use of GFortran (GCC11) for the numbers published here, allowing us more apple-to-apples comparisons. The figures don’t change much for the C/C++ workloads, but we get a more complete set of figures for the suite due to the Fortran workloads. We keep flags very simple at just “-Ofast” and nothing else.

SPECint2017 Rate-1 Estimated Scores

In SPECint2017, the differences to the M1 are small. 523.xalancbmk is showcasing a large performance improvement, however I don’t think this is due to changes on the chip, but rather a change in Apple’s memory allocator in macOS 12. Unfortunately, we no longer have an M1 device available to us, so these are still older figures from earlier in the year on macOS 11.

Against the competition, the M1 Max either has a significant performance lead, or is able to at least reach parity with the best AMD and Intel have to offer. The chip however doesn’t change the landscape all too much.

SPECfp2017 Rate-1 Estimated Scores

SPECfp2017 also doesn’t change dramatically, 549.fotonik3d does score quite a bit better than the M1, which could be tied to the more available DRAM bandwidth as this workloads puts extreme stress on the memory subsystem, but otherwise the scores change quite little compared to the M1, which is still on average quite ahead of the laptop competition.

SPEC2017 Rate-1 Estimated Total

The M1 Max lands as the top performing laptop chip in SPECint2017, just shy of being the best CPU overall which still goes to the 5950X, but is able to take and maintain the crown from the M1 in the FP suite.

Overall, the new M1 Max doesn’t deliver any large surprises on single-threaded performance metrics, which is also something we didn’t expect the chip to achieve.

Power Behaviour: No Real TDP, but Wide Range CPU MT Performance: A Real Monster
POST A COMMENT

493 Comments

View All Comments

  • xol - Monday, March 21, 2022 - link

    quote "Apple’s die shot of the M1 Max was a bit weird initially in that we weren’t sure if it actually represents physical reality – especially on the bottom part of the chip we had noted that there appears to be a doubled up NPU – something Apple doesn’t officially disclose"

    It looks like the old die shots were deliberately misleading - it's easy to compare the old and new images of M1 Max post M1 Ultra release. Where the "2nd NPU" was appears to be where the 'interposer hardware" is today.

    Probably intentional on apple's part (the article could be post-updated ?)
    Reply
  • bubka9 - Wednesday, June 15, 2022 - link

    Polskie Sloty https://polskie-sloty.com/game-category/sloty-owoc... is fantastic gaming experience. Wouldn't go anywhere else to throw away my money, haha! It's rekindled my love of gambling and I'm making money doing it. Great bonuses and free spins also. Reply
  • techbug - Tuesday, August 16, 2022 - link

    Are the binaries compiled with LP64 or ILP32 data model? Thanks Reply

Log in

Don't have an account? Sign up now