The answer to this question depends on how much RAM your computer has, how much RAM you plan to use for your Remote Desktop session, and how much RAM your Remote Desktop client has.
The Remote Desktop client (RDC) is the program that allows you to connect to a Remote Desktop session. The RDC has its own memory requirements, and you can set the amount of RAM you want to use for your Remote Desktop session.
The amount of RAM you use for your Remote Desktop session is the same amount of RAM that you use for any other programs on your computer.
The amount of RAM you use for your Remote Desktop session depends on the amount of RAM your computer has, how much RAM you plan to use for your Remote Desktop session, and how much RAM your Remote Desktop client has.