The maximum amount of RAM that can be upgraded depends heavily on the speed and capacity of the RAM. Generally speaking, most systems have a limit of 32GB in terms of memory capacity. The speed at which the RAM runs is an important consideration as well; for instance, DDR4-3200 is usually the fastest available option. Ultimately, it is important to check with the manufacturer for exact specifications before attempting to upgrade RAM in any system. It should also be noted that many laptop computers are limited in their upgradability when compared to desktop computers.