Your CPU, GPU, and RAM all connect to the motherboard, which lets them communicate with one another. The more RAM you have, the more your computer can handle - the more tasks it can process - at once. Your computer uses RAM (random access memory) to juggle all its active tasks at any given moment. Just like your CPU, your GPU can also overheat if you give it more than it can handle. Knowing your GPU specs is especially important for gaming and other graphics-intensive tasks like video editing. Your GPU (or graphics processing unit) handles everything you see on your screen. An overworked CPU can easily overheat, so it’s good to monitor your CPU temperature, especially when putting it under heavy stress. Many programs need a CPU with a minimum level of processing power, so you’ll want to know exactly what your computer can handle. Applications in the last 8 hours, apps that have run in the last 8 hours.The CPU (central processing unit) is your computer’s brain.Selected Processes, processes that you selected in the Activity Monitor window.Windowed Processes, processes that create a window for user action, usually apps.Inactive Processes, processes that are sleeping.Other User Processes, processes not owned by the root user (administrator account) or the current user.System Processes, processes owned by macOS.

My Processes, processes owned by your macOS® user account.

All Processes Hierarchically, this allows you to see parent/child relationships in processes.

You can then choose how much information to display and in what format.

You can choose from CPU, Memory, Energy, Disk, Network, and Cache.

Choose the process category you'd like to check on.

To access the Activity Monitor go to Finder, Applications, Utilities.

The easiest way to check system performance on a Mac is to use the Activity Monitor, a built-in application that gives you a live overview of your Mac’s hard drive, RAM, processor, and network usage.

How to check mac cpu speed