In the theme of testing your video card as accurately as possible, make sure any programs you frequently use are open. For example, if you usually have iTunes and a web browser open while working, open those programs before you run your benchmark test. Go to https://novabench.com/ in your computer's web browser. Novabench is a program that has some free aspects, one of which includes assigning to your video card a score that you can use to compare your video card's performance to the ideal score. It's a green button near the top of the page. This is on the left side of the page. Below the Personal Use, click the operating system for which you want to download the installer. This will prompt the installer file to begin downloading onto your computer. You may need to specify a save location or click Save File before the file will download. Double-click the downloaded file, then click through the on-screen prompts until you've installed Novabench. On a Mac, you'll drag the Novabench app icon onto the "Applications" folder icon to begin the installation process.
Open programs you commonly use. Open the Novabench website. Click Download for Free. Click Personal Use. Select your operating system. Install Novabench.