CPU MT Performance: A Real Monster

What’s more interesting than ST performance, is MT performance. With 8 performance cores and 2 efficiency cores, this is now the largest iteration of Apple Silicon we’ve seen.

As a prelude into the scores, I wanted to remark some things on the previous smaller M1 chip. The 4+4 setup on the M1 actually resulted that a significant chunk of the MT performance being enabled by the E-cores, with the SPECint score in particular seeing a +33% performance boost versus just the 4 P-cores of the system. Because the new M1 Pro and Max have 2 less E-cores, just assuming linear scaling, the theoretical peak of the M1 Pro/Max should be +62% over the M1. Of course, the new chips should behave better than linear, due to the better memory subsystem.

In the detailed scores I’m showcasing the full 8+2 scores of the new chips, and later we’ll talk about the 8 P scores in context. I hadn’t run the MT scores of the new Fortran compiler set on the M1 and some numbers will be missing from the charts because of that reason.

SPECint2017 Rate-N Estimated Scores

Looking at the data – there’s very evident changes to Apple’s performance positioning with the new 10-core CPU. Although, yes, Apple does have 2 additional cores versus the 8-core 11980HK or the 5980HS, the performance advantages of Apple’s silicon is far ahead of either competitor in most workloads. Again, to reiterate, we’re comparing the M1 Max against Intel’s best of the best, and also nearly AMD’s best (The 5980HX has a 45W TDP).

The one workload standing out to me the most was 502.gcc_r, where the M1 Max nearly doubles the M1 score, and lands in +69% ahead of the 11980HK. We’re seeing similar mind-boggling performance deltas in other workloads, memory bound tests such as mcf and omnetpp are evidently in Apple’s forte. A few of the workloads, mostly more core-bound or L2 resident, have less advantages, or sometimes even fall behind AMD’s CPUs.

SPECfp2017 Rate-N Estimated Scores

The fp2017 suite has more workloads that are more memory-bound, and it’s here where the M1 Max is absolutely absurd. The workloads that put the most memory pressure and stress the DRAM the most, such as 503.bwaves, 519.lbm, 549.fotonik3d and 554.roms, have all multiple factors of performance advantages compared to the best Intel and AMD have to offer.

The performance differences here are just insane, and really showcase just how far ahead Apple’s memory subsystem is in its ability to allow the CPUs to scale to such degree in memory-bound workloads.

Even workloads which are more execution bound, such as 511.porvray or 538.imagick, are – albeit not as dramatically, still very much clearly in favour of the M1 Max, achieving significantly better performance at drastically lower power.

We noted how the M1 Max CPUs are not able to fully take advantage of the DRAM bandwidth of the chip, and as of writing we didn’t measure the M1 Pro, but imagine that design not to score much lower than the M1 Max here. We can’t help but ask ourselves how much better the CPUs would score if the cluster and fabric would allow them to fully utilise the memory.

SPEC2017 Rate-N Estimated Total

In the aggregate scores – there’s two sides. On the SPECint work suite, the M1 Max lies +37% ahead of the best competition, it’s a very clear win here and given the power levels and TDPs, the performance per watt advantages is clear. The M1 Max is also able to outperform desktop chips such as the 11900K, or AMD’s 5800X.

In the SPECfp suite, the M1 Max is in its own category of silicon with no comparison in the market. It completely demolishes any laptop contender, showcasing 2.2x performance of the second-best laptop chip. The M1 Max even manages to outperform the 16-core 5950X – a chip whose package power is at 142W, with rest of system even quite above that. It’s an absolutely absurd comparison and a situation we haven’t seen the likes of.

We also ran the chip with just the 8 performance cores active, as expected, the scores are a little lower at -7-9%, the 2 E-cores here represent a much smaller percentage of the total MT performance than on the M1.

Apple’s stark advantage in specific workloads here do make us ask the question how this translates into application and use-cases. We’ve never seen such a design before, so it’s not exactly clear where things would land, but I think Apple has been rather clear that their focus with these designs is catering to the content creation crowd, the power users who use the large productivity applications, be it in video editing, audio mastering, or code compiling. These are all areas where the microarchitectural characteristics of the M1 Pro/Max would shine and are likely vastly outperform any other system out there.

CPU ST Performance: Not Much Change from M1 GPU Performance: 2-4x For Productivity, Mixed Gaming
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  • noone2 - Tuesday, October 26, 2021 - link

    The laptop will be worthless and insanely outdated by the time and SSD dies, making it irrelevant even if that was the case.
  • flyingpants265 - Sunday, October 31, 2021 - link

    What an extremely dumb comment. Old Macbooks aren't worthless, they hold their value extremely well. If you use the Mac for what it's intended (video work) it's possible that you'll do damage to the drive.

    You really are an absolute idiot if you think there's an excuse for soldering SSDs. It's like welding in the suspension on your car because "the car will be worthless and outdated". No. They have a limited lifespan and need to be replaced when they die.
  • varase - Wednesday, November 3, 2021 - link

    Then you take it in and have the logic board traded for a refurbished one, then restore your data.

    Anyone who doesn't take off-computer backups is an idiot and is deserves to lose data whether it sits on a HDD or SSD.

    All drives fail eventually. I have at least two backups of everything, including my ginormous disk array. And when your replaceable SSD dies, it will take everything with it too.
  • coolfactor - Tuesday, October 26, 2021 - link

    I'm typing this on a 2013 MacBook Air. 8 years and going strong. You chose "3000 writes" to sound dramatic, but that's the low end of low-end SSDs, none of which are used in Macs. SSDs can be rated up to 100,000 writes, and Samsung even promotes some of theirs as lasting 10 years under heavy usage. So your argument is weak, sorry.
  • AshlayW - Tuesday, October 26, 2021 - link

    Just as anecdotal as your emotional reply to defend your product/purchase decision. Look up Louis Rossmann on YT if you want to know what kind of company you are supporting.
  • caribbeanblue - Saturday, October 30, 2021 - link

    Unfortunately, these MacBooks are the best laptops on the market. Repairability is only part of the story, and the repairability of a device isn't just about ease of repair that is enabled by hardware design choices, it's also about the company providing board-level schematics to 3rd party repair shops, so users can have access to cost friendly genuine repair. Apple does have a long way to go in that aspect, that is true, however they *definitely* should not be forced to not solder down their SSD or DRAM. Soldering down such components earn you big improvements in terms of performance, energy efficiency, and space savings. If you want a laptop with a socketed RAM & removable SSD, then that's fine, buy something else, but don't act like MacBooks don't have any selling points, you would be delusional for thinking that.
  • varase - Wednesday, November 3, 2021 - link

    Louis Rossmann is a religious zealot.

    He's a repair gnome, not an innovator or designer.
  • UnNameless - Wednesday, November 17, 2021 - link

    LR sadly became a jest! A joker filled with hate! I respected him a lot back in the days he mostly had content on repair stuff! I also agree with him about the Right to Repair and most of the issues regarding Mac stuff repairs! But his war for RtoR became a crusade and went nuts in the last year or so when he also started to bash Apple on software stuff and practically everything he can find awful! And I wouldn't have said nothing if he'd be an informant software guy, but he's an repair engineer, a good one and he should have sticked with that! From the fiascos with the Apple services and firewall whitelists, to the Apple OCSP so poorly misunderstood by him and even worse presented, to Apple hashing etc. Ever since he became a couch diva with that freaking cat, instead a shop repair guy...his true colors and hate towards just oozed so smoothly from his skin!
  • RealAlexD - Monday, November 1, 2021 - link

    3000 writes are actually a pretty good durability for a pro consumer SSD. While it is true, that some SSDs are rated for up to 100k writes, those are SLC devices, which are not really used anymore outside of special cases (Samsung Z-NAND). Normal SDDs will either have TLC or QLC Flash cells (or maybe 2bit MLC, but even Samsung Pro SSDs are now TLC), which don't last nearly as long.
    The TLC SSD with the most writes I could find was a Seagate Nytro Write intensive Server SSD, than promises about 20k writes.

    Also conditions effect the number of writes a Flash cell will survive, here running warmer actually can increases lifetime. And the advertised durability is a worst case durability.
  • UnNameless - Wednesday, November 17, 2021 - link

    I agree! Been using my iMac Pro from 2018 till present! Before I started earlier this year my little experiment with Chia plotting, which is known to burn up SSDs like nothing else, I had 99% lifetime drive left in my 1TB SSD. Even before I ran my experiment, I tried to search online to find what kind of nand flash the iMP uses but couldn't find any real concrete stuff as Apple has customs chips in those SSDs. So I took it for a spin and in the course of weeks I wrote in excess of 1PB of data! SSD lifetime dropped from 99% to 86%. If this scales linearly, I reckon you'd have to write in excess of 10PB of data on a 1TB SSD to bring it to critical levels or burn it completely! And I have never heard of anyone that does such a thing!

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