For comfortable use of the Windows operating system, 4 GB is sufficient. Generally, the more RAM, the better and smoother your computer will run. Powerful and professional gaming laptops typically have a capacity of 16 GB RAM. In looking to buy additional RAM, it is necessary to assess the characteristics of your motherboard - the number of slots, the type of supported memory, etc. The maximum RAM capacity is also affected by the type of operating system, for example a 32-byte (x86) system is only able to use a little over 3 GB of RAM.