RAM is distributed among many circuits on the mainboard and connected with some type of board. Quite often, RAM is soldered to the board and can’t be removed or replaced except by a professional and would more than likely void the warranty. However, there are small ram modules that come loose on trays for easy access to upgrade your computer’s ram without voiding your warranty. These trays also allow you to add memory when you need it more than what was originally installed or pre-installed in your system such as for image processing, video editing, etc. A lot of desktop PC’s come with one stick installed with two slots available for upgrades.