A new 2021 revision, launched Tuesday, adds more RAM, a 10% brighter screen and a slightly updated design. Like its 2019 predecessor, the new HD 10 starts at $150 (£150).

Simply installing new or additional RAM sticks can kick your PC's performance into high gear. Here's how to do it, plus four options to buy.

Adding more RAM to your iMac is an easy way to give your computer more multitasking juice. Look out, open Chrome browser tabs!