A recent teardown has shown that Apple’s new M2 Pro and M2 Max-based MacBook Pro note feature a considerably smaller heatsink due to supply chain issues.
According to recent reports by iFixit and MaxTech, the new MacBook Pro’s revised thermal architecture appears to be caused by the reduced overall footprint of the M2 Pro and M2 Max SoCs inside the device, as noted by iFixit and Max Tech.
The M1 Pro and M1 Max MacBook Pro models contained two, large memory modules, but the M2 Pro and M2 Max MacBook Pro models contain four slimmer memory modules. Even though the M2 Pro and M2 Max dies are physically larger than those of the M1 Pro and M1 Max, the SoCs as a whole take up less space.
The new notebooks do not require as larger a heatsink as that used in the previous generation and it’s not immediately clear if this significantly impacts thermal efficiency.
The reason for the change and the use of smaller memory modules appears to have stemmed from supply chain issues. The entire SoC is mounted on a substrate, so four smaller modules allow Apple to use a smaller substrate, making a saving on materials and reducing complexity as a result.
Dylan Patel, Chief Analyst at SemiAnalysis, offered the following comment to iFixit:
ABF substrates were in very short supply when Apple made the design choice. By using four smaller modules rather than two larger ones, they can decrease routing complexity within the substrate from the memory to the SoC, leading to fewer layers on the substrate. This allows them to stretch the limited substrate supply further.
The M2 and M2 Max-based MacBook Pro notebooks offer up to 20 percent better CPU performance and 30 percent better GPU performance than their predecessors. Since the chips continue to be based on TSMC’s 5nm process, some users have noted that Apple may have made thermal tradeoffs in order to deliver improved performance.
Stay tuned for additional details as they become available.