Mar 18, 2024
For those who prioritise productivity and are considering the 13-inch or 15-inch M3 MacBook Air as their main computer, a significant feature was the ability to connect two external monitors, a functionality available only when the device is used in clamshell mode, meaning with the lid shut.
However, recent testing reveals a substantial performance drop in this mode, raising questions about whether the additional monitor support is worth this compromise.
M3 MacBook Air stress test
The YouTube channel Max Tech conducted several tests using the 3DMark Wild Life Extreme Stress Test, running them for 20 minutes. They found that the performance of the M3 MacBook Air significantly diminishes with the lid closed.
Initially, the new model scored 8,083 points, but as the testing continued, the score fell to 5,916 points. This decline is attributed to the model's fan-less design, which struggles with efficient heat dissipation.
Performance comparison with M3 MacBook Air's lid open
Earlier, Max Tech had reported temperatures of the M3 SoC during the same test, with the CPU reaching a concerning 114 degrees Celsius and the GPU at 102.9 degrees Celsius.
Despite using a thin heatsink for three generations, it appears insufficient for optimal heat management. In clamshell mode, the M3 MacBook Air's performance nearly halves, plummeting to a score of 4,198.
The design of the M3 MacBook Air might allow some cooling when the lid is open, as air can circulate over the keyboard, aiding heat transfer.
However, in clamshell mode, this airflow is obstructed, leading to greater performance losses. Users noticing this slowdown may consider switching to the M3 MacBook Pro, which includes an active cooling fan or opt for a single external monitor setup.
Improvements in M3 MacBook Air
Apple did make two commendable upgrades with the M3 MacBook Air: using two NAND flash chips for the 256GB model, resulting in faster SSD speeds than its M2 predecessor, and designing the battery for easier removal without adhesive.
Yet, these stress tests indicate significant potential for enhancements, especially the hope that Apple might introduce a cooling fan in the future M4 model for better performance management.
