They have a handful of LPDDR5x capacities and mix-and-match them as needed.
Like 1 8GB chip for a M3 with 8GB of RAM, 2 8GB chips for a M3 with 16GB of RAM, 2 12GB chips for a M3 with 24GB of RAM, 3 6GB chips for a M3 Pro with 18GB of RAM, 3 12GB chips for a M3 Pro with 36GB of RAM, etc., etc. with the M3s using 1 or 2 channel RAM, the M3 Pros using 3 channel RAM and the M3 Maxes using 4 channel RAM and the top spec RAM configuration being 4 32GB (128GB total) modules.
In fact the M3 with the 8GB configuration literally has an empty RAM slot on the motherboard they didn’t populate. They likely have three motherboard configurations - dual channel, three channel and four channel motherboards with a M3, M3 Pro or M3 Max respectively.
They have a handful of LPDDR5x capacities and mix-and-match them as needed.
Like 1 8GB chip for a M3 with 8GB of RAM, 2 8GB chips for a M3 with 16GB of RAM, 2 12GB chips for a M3 with 24GB of RAM, 3 6GB chips for a M3 Pro with 18GB of RAM, 3 12GB chips for a M3 Pro with 36GB of RAM, etc., etc. with the M3s using 1 or 2 channel RAM, the M3 Pros using 3 channel RAM and the M3 Maxes using 4 channel RAM and the top spec RAM configuration being 4 32GB (128GB total) modules.
In fact the M3 with the 8GB configuration literally has an empty RAM slot on the motherboard they didn’t populate. They likely have three motherboard configurations - dual channel, three channel and four channel motherboards with a M3, M3 Pro or M3 Max respectively.