The Microsoft Surface Laptop 4 is available in two sizes and comes with a variety of configurations, including 8GB, 16GB, or 32GB of RAM.
It is not possible to upgrade the RAM as it is soldered onto the motherboard.
To upgrade the RAM, you will need to remove the existing DIMMs and replace them with additional memory.
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Both 13-inch and 15-inch versions of Surface Laptop 4 come with dual-channel soldered memory and there is no additional RAM slot for expansion. So make sure you purchase a Surface Laptop 4 model with the right amount of RAM (8GB, 16GB, or, 32GB) for your workload.
Can you add RAM to Surface Laptop 4? - SurfaceTip
Microsoft has unveiled the Surface Laptop 4, which is available in two sizes and comes with a variety of configurations. It has a clamshell build with a touchscreen display, built-in HD front-facing camera, a studio microphone array, and Dolby Atmos speakers. The laptop is available for pre-order and will start shipping on April 15th, with the 13.5-inch model featuring an AMD Ryzen 5 processor and the 15-inch model featuring an AMD Ryzen 7 processor.
The Microsoft Surface Laptop 4's only major upgrade is under ... - Mashable