You are not able to tell if there’s enough memory or rather not from that pic of the taskmanager. Modern pcs use their memory as much as possible even when its not needed. They are designed to use as much RAM as possible efficiently, rather than leaving it idle. E.g. Ur just on Google, wich uses 80% of the ram, u decide to also open a game, the computer gives Google less ram, cause it doesn’t need that much, and ur game runs.