The RAM is from Samsung and the spec is DDR4 2666 MHz. My unit came with 8 GB of RAM (4 GB soldered on board and 4 GB on an user upgrade-able stick).

It is surprising to see that though the AMD Ryzen 5 3500U supports up to 2400 MHz DDR4 RAM, Lenovo is using 2666 MHz RAM on it. The memory operates at 2400 MHz only which can be seen from CPU-Z or other similar software.