RAM (Random Access Memory) is a device's short term memory, which it uses to handle any heavy file load without causing lags or slowdown on the software. To quickly open small files on Revit, the minimum RAM requirement is 8GB. If we talk about big files, you will need at least 16GB of RAM on your system so that the software can run smoothly. Bigger RAM will smooth down the performance of the software; make sure your Laptop is compatible with that RAM.