[NAME]  Buy the RAM and if it doesn't work return it,  I know this sound Stupid But Maximum RAM in specs sheet it the amount of RAM Dell engineers have tested the machine with and sell with. They also put similar limitations for SSDs and HDDs and a lot of user upgrade them anyways.    Buy memory from a place which has a decent return policy.   
I recently bought a G3 15 3500 M10P and in the manual it says the RAM is limited to 16gb. I am just curious as to why it is limited to that amount, when the CPU (Intel I5-10300H) supports up to 128gb of RAM and it is possible to fit, for example, two 16gb chips. Does anyone know the reasoning behind that?
RAM Limitation