The Nintendo Switch has already been torn down, revealing some interesting things: a custom NVIDIA Tegra X1 chip that perfectly matches the second-gen Shield TV's 20nm Tegra X1 transistor count, and the possible confirmation that the handheld-console hybrid will use efficient DDR4 mobile RAM.
We already know the Nintendo Switch should use 4GB of unified shared RAM system memory, but until now we weren't exactly sure how fast or what grade of memory would be in the Switch. Now we might know. According to recent Switch teardowns spotted on Chinese site Tabao, two Samsung-made SDRAM modules were spotted on the system's PCB.
The pictures are very fuzzy, but the consensus is that the SDRAM modules are K4F2E304HBMGCH modules, which are described as "LPDDR4 DRAM Chip Mobile LPDDR4 DRAM 16G-Bit 512Mx32 1.8V 200-Pin FBGA." These particular Samsung LPDDR4 modules have a 16gigabit density, which is 2GB, and there are two of them totaling for 4GB of unified LPDDR4 memory. Samsung's website confirms these modules can have maximum frequencies of up to 2666MHz, however I think its likely the Switch's 4GB of unified LPDDR4 memory will be clocked at 1600MHz, and scroll down to find out why.