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| Apple MacBook Pro 16 & MacBook Pro 14 |
There is an old adage in the world of high-performance computing: "With great power comes great thermal responsibility." It is a lesson that Apple has had to relearn with every generation of its silicon. When we first got our hands on the new MacBook Pro 14-inch with the M5 Max chip—specifically the high-end variant featuring the 40-core GPU—we were ready to declare it the greatest compact workstation on the market. However, the silicon lottery took a backseat to the laws of physics.
During our initial review, we encountered a frustrating paradox. Despite the introduction of a new "High Power Mode" designed to unleash the beast, the CPU performance was erratic. The numbers weren't just fluctuating; they were barely better than the previous generation M4 Max. Meanwhile, the graphics performance was equally unstable, dropping frames and scores under sustained load. Our speculation was simple: The M5 Max is a power plant that simply generates too much heat for the 14-inch chassis to dissipate effectively.
That speculation has now been put to the test. We have finally received our review unit of the MacBook Pro 16-inch with the M5 Max, and the results confirm that size matters when you are trying to tame Apple's most powerful silicon yet.
Breaking the Thermal Barrier
The moment we unboxed the 16-inch variant, the narrative changed. Where the 14-inch model struggled to maintain its composure, the larger chassis—with its increased thermal mass and larger heat sink—simply shrugs off the load.
We ran our initial benchmark suite immediately, and the numbers tell a story of liberation from thermal throttling.
CPU Performance: A Massive Lead
In the Cinebench 2024 Multi-Core test, the MacBook Pro 16 with the M5 Max scored a staggering 2437 points. To put that into perspective, that is 18% faster than the M5 Max chip running inside the MacBook Pro 14 (which scored 2073 points). It also represents a generational leap over the previous king, the M4 Max in the MacBook Pro 16, which we saw scoring between 2015 and 2069 points depending on the mode.
What is perhaps more impressive than the raw number is how it achieved it. Unlike the 14-inch model, which required the "High Performance" mode just to try (and fail) to stay stable, the 16-inch machine achieved this record-breaking score in the standard Automatic mode. Not only was it faster, but it was also significantly quieter. The fans on the 16-inch model barely broke a sweat to cool the chip, whereas the 14-inch model sounded like a jet engine preparing for takeoff just to deliver lower numbers.
During a single benchmark run, we observed the CPU cores consuming between 65 and 78 Watts—a significantly higher power draw than we could sustain on the 14-inch model. The 16-inch chassis provided the headroom needed to let the M5 Max stretch its legs.
Graphics Stability: Smooth Sailing
The disparity was even more apparent on the GPU side. In our review of the 14-inch MacBook Pro, the graphics performance was a tale of two modes. In Automatic mode, the GPU performance tanked by 25% under sustained load. Even when we forced High Power mode, it still dropped by 7.4% .
The MacBook Pro 16 has completely eradicated this issue. In our 3DMark Steel Nomad test, the GPU performance is not only higher but completely stable under sustained workloads. The raw score gives the M5 Max in the 16-inch a 12% advantage over the same chip in the smaller chassis, and a massive 21% lead over the M4 Max in the previous generation 16-inch model.
The Verdict (So Far)
Our initial testing confirms that the M5 Max is a much better fit for the larger MacBook Pro 16. The thermal constraints of the 14-inch model essentially cap the potential of this chip. If you are a video editor, a 3D artist, or a developer running multi-threaded compiles all day, the performance difference between the 14-inch and 16-inch models is not incremental—it is significant.
If you are trying to decide which M5 Max to buy, the choice is becoming clear. While the 14-inch offers portability, the 16-inch offers performance.
For those looking for a slightly different balance of power and efficiency, our colleague recently reviewed the "Goldilocks" option of the lineup—the MacBook Pro 16 with the M5 Pro. You can check out that in-depth analysis here: MacBook Pro 16 M5 Pro 2026: The Goldilocks.
We are currently putting the M5 Max 16-inch through our full battery of tests, including thermal imaging and long-form video export stress tests. However, based on these initial benchmarks, it is clear that the M5 Max was always meant to live in a big body. The 14-inch model is powerful, but the 16-inch is the true workstation.