iMac 27" 2020
To make sure you can pick up the Desktop PC that best suits your needs, we put every model through our exhaustive lab tests, so we can tell you if the model you're interested in is up to scratch or not.
We test Desktop PCs exactly as you would use them, cutting through the advertising blurb and revealing the truth about those marketing claims.
In this article:
Which? exists to give consumers impartial advice, which means that if a product isn't any good, we'll say so, without fear of penalty. Which? works for you, providing trustworthy advice without a hidden agenda.
We examine everything that matters across all products, including performance, features and how well they work in real life – so you'll know exactly what to expect. Our unique, comparative lab tests mean you can trust our Best Buy and Don't Buy verdicts, and choose with confidence.
Which? tests more than 3,000 products every year, including more home technology products than anyone else. We look at new products as soon as they are announced, helping you to understand new technologies and whether they are worth your money.
Dedicated business researchers carefully select the products Which? tests, scouring the market for the latest releases and the most innovative products. Our business researchers aim to cover a very high percentage of the market in any one product area. And, while we do test some premium products, we avoid testing those products that you would need a second mortgage to afford. We take the following criteria into account when choosing all-in-one computers:
Our expert assessors test our products for their ease of use by running through everyday scenarios that replicate how you use your PC.
For Desktop computers, we check how straightforward they are to install and set up, and how convenient it is to perform everyday operations such as inserting DVDs, transfer files, and turning the computer on and off. We also check how long it takes for the PC to boot up, and the accessibility of USB ports.
Our products undergo a range of extensive laboratory tests to assess performance.
We check all products for energy efficiency to make sure that they do not cost you, and the earth, once they are plugged in. For Desktop computers, we check the energy use when the machine is switched on but also when it's switched off, as they can still draw power.
We give the Desktop PCs we test a total test score, so you can easily see which are the best and worst, and directly compare models with each other. The score we give each all-in-one is made up of a combination of the elements of our tests, ignoring price, and is broken down as follows:
Desktop PCs must score 75% or more overall to be a Best Buy.