Mac Studio's Cooling System: How the Same Small Box Went From 115 W to 385 W
· By Xin Wang · 中文
Mac Studio is just 19.7 cm square and 9.5 cm tall, yet it houses Apple's top Max and Ultra chips. From the first model in 2022 to this year's M5 generation the enclosure has not changed size, while Apple's published maximum power has risen from 115 W to 385 W. This article first explains the cooling design from Apple's own material, then uses 22 hours of data we logged on an M5 Max Mac Studio to show how hot it actually runs, and how fast the fans spin, in everyday use and while gaming.
Summary
- The design: Double-sided blowers, precisely placed airflow channels and over 4,000 perforations on the back and bottom; the thermal module uses recycled copper and aluminium.
- Power has multiplied: Apple's measured maximum: M1 Max 115 W to M5 Max 200 W, M1 Ultra 215 W to M5 Ultra 385 W, in an enclosure of the same size.
- Almost no effort day to day: Our M5 Max averaged about 14 W in everyday use and overnight idle, with the fans parked at their minimum of about 1,000 rpm.
- Gaming barely woke it up: In Diablo IV with maximum ray tracing the system peaked at 155 W, the GPU at 75 °C and the fans at 1,939 rpm, about 53% of their maximum; thermal pressure stayed "nominal" throughout.
- Limits: One unit, gaming load only; no full CPU stress test, no noise measurement, and room temperature was not recorded.
- The design: where the air goes in and out
- Same enclosure, several times the power
- Our test: 22 hours on one M5 Max
- How fast the fans spin while gaming
- What this data does and does not show
- FAQ
The design: where the air goes in and out
When Apple launched the first Mac Studio in 2022 it described the cooling as a system of double-sided blowers, precisely placed airflow channels and over 4,000 perforations on the back and bottom of the enclosure, which guide air through the internal components and cool the chips (Apple newsroom). Today's specs page adds that the thermal module uses 100% recycled aluminium in its sheet and 100% recycled copper in its plate (specs).
The layout has two advantages: the raised base leaves a gap between the machine and the desk so the intake is hard to block, and hot air leaves at the back rather than blowing at the person in front. Videos online mention "2,000+ vents"; that probably counts only the back, while Apple's own figure is over 4,000 across back and bottom.
Same enclosure, several times the power
Apple's support page lists idle and maximum power for every Mac Studio. Maximum power is measured at the wall with a test that saturates the processor, includes power-supply losses, and is taken at 20.2 °C ambient.
The enclosure has stayed the same size for four years (19.7 × 19.7 × 9.5 cm), yet M5 Max's maximum is 74% higher than the original M1 Max and M5 Ultra's is 79% higher than M1 Ultra. Apple also notes that higher ambient temperatures make the fans spin faster and raise power consumption, so the same machine behaves differently in a hot room.
Our test: 22 hours on one M5 Max
On 3 and 4 October 2026 we ran a logger on a Mac Studio (M5 Max, 18-core CPU, 40-core GPU, 64GB memory, 1TB SSD) that read the system sensors every 30 seconds: hottest CPU core, GPU temperature, system power, both fan speeds, and the system's own "thermal pressure" level. During games, Apple's built-in powermetrics tool also logged CPU and GPU power separately. The Mac ran macOS 27.0 and the 27.2 beta with a 4K 240Hz monitor running at 120Hz.
| State | Length | Avg power | Max power | Hottest CPU core | GPU max | Fan max |
|---|---|---|---|---|---|---|
| Everyday daytime use | 9.7 h | 14 W | 117 W | 72 ℃ | 48 ℃ | 1,009 rpm |
| Overnight idle | 8.3 h | 14 W | 54 W | 70 ℃ | 40 ℃ | 1,008 rpm |
| Diablo IV, session 1 | 17 min | 83 W | 144 W | 85 ℃ | 70 ℃ | 1,245 rpm |
| Diablo IV, session 2 | 32 min | 99 W | 155 W | 83 ℃ | 75 ℃ | 1,939 rpm |
- Everyday use and idle cost almost nothing: about 10 hours of normal daytime use and 8 hours of overnight idle both averaged about 14 W, with both fans at their minimum of about 1,000 rpm.
- Short spikes do not spin the fans up: a momentary 117 W peak during the day briefly took the hottest CPU core to 73 °C with no change in fan speed.
- Thermal pressure never rose: over 22 hours the system's thermal pressure stayed at the lowest level, "nominal".
How fast the fans spin while gaming
The heaviest load was two sessions of Diablo IV (running through CrossOver): about 17 minutes going from true 4K with ray tracing off to 2496×1404 with high and maximum ray tracing, and about 32 minutes at true 4K and 2496×1404 with maximum ray tracing. The chart shows the second session.
- Power: 99 W average and 155 W peak in the second session; the GPU averaged about 30 W with a 78 W spike, the CPU about 17 W with a 30 W peak.
- Temperature: GPU up to 75 °C, hottest CPU core up to 83 °C (85 °C in the first session).
- Fans: only 1,245 rpm at most in the first session; 1,939 rpm at most and about 1533 rpm on average in the heavier second one. With a maximum of about 3,625 rpm, the fans used roughly half their range at the busiest moment.
- No sign of throttling: thermal pressure stayed "nominal" in both sessions.
On these numbers the design leaves plenty of headroom on M5 Max: it lets temperatures rise a little rather than spin the fans up, trading a few degrees for quiet. Our 155 W is the system power reported by the sensors, not Apple's wall measurement, so it cannot be compared directly with the 200 W figure; it does show that a game is some way from the full load Apple tests with.
What this data does and does not show
- One machine, an M5 Max, not an Ultra. Fan curves and temperatures may differ between units and configurations.
- Gaming load only. Diablo IV mainly loads the GPU, with the CPU averaging only 17 to 20 W; we did not run a long full-CPU load such as rendering or a large build, where the fans would likely go higher.
- Room temperature was not recorded. Apple itself says warmer rooms mean faster fans, so this data does not represent a hot environment.
- No noise measurement. The article reports fan speed only, not decibels.
- Short gaming sessions (17 and 32 minutes); several hours of continuous heavy load were not tested.
FAQ
Is Mac Studio loud?
On our M5 Max the fans stayed at their minimum of about 1,000 rpm in everyday use and idle; in Diablo IV with maximum ray tracing they peaked at 1,939 rpm, about half of the 3,625 rpm maximum. We did not measure noise in decibels.
How many cooling holes does Mac Studio have?
When Apple launched Mac Studio in 2022 it said there are over 4,000 perforations on the back and bottom of the enclosure. Figures of "2,000+" online probably count only one side.
What is the maximum power of the M5 Max Mac Studio?
Apple's support page lists M5 Max (18-core CPU, 32-core GPU) at 7 W idle and 200 W maximum, and M5 Ultra at 9 W and 385 W, measured at the wall at 20.2 °C ambient.
Does it throttle when gaming?
In about 50 minutes of Diablo IV across two sessions, our M5 Max's thermal pressure stayed "nominal" throughout. We did not test a long full-CPU load.
Read next
- M5 Max Mac Studio and a 4K 240Hz monitor: troubleshooting on the same machine.
- Specs library: specs and benchmarks for Apple chips and devices.
- All articles
This is an independent third-party site with no affiliation with Apple Inc. The design description and power figures come from Apple's published material; the test data was recorded by the author on one Mac Studio (M5 Max) on 3 and 4 October 2026 and reflects only that machine in that environment and load. The diagram explains principles only.