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Best all-in-one computers 2020

We've tested more than a dozen all-in-one desktops (both Windows machines and Apple iMacs) to find the best desktop and monitor combinations on the market. The best all-in-one computer we've tested is the Asus Zen AiO Pro Z240IE, which packs a gorgeous 4K display and discrete graphics into a sleek design. 

If you're looking for something less expensive, our value pick is the Acer Aspire Z24, which offers a great all-in-one PC for under $1,000.

All-in-one desktops are a great middle ground for those seeking a great home computer — they take up less room than traditional towers, and offer more screen space than even the largest laptops. These unique systems pack their components, ports and monitors into a single unit, allowing you to easily put one on your desk, plug in and get to work (or play).

The best all-in-one PCs of 2020

Asus Zen AiO Pro Z240IE

(Image credit: Future)

1. Asus Zen AiO Pro Z240IE

Best all-in-one computer overall

Display: 23.8-inch display with 3840 x 2160 resolution | Special Features: USB Type-C | Processor: Intel Core i7-7700T | Graphics: Nvidia GeForce GTX 1050

Beautiful 4K display
Strong general performance
USB Type-C
Dim display
Minimal support for modern gaming
Buzzy speakers

The Asus Zen AiO Pro Z240IE delivers potent processing, discrete graphics and a lovely 4K touch screen, all in a stylish, yet affordable design. Equipped with an Intel Core i7-7700T processor and Nvidia GeForce 1050 graphics card, this stylish all-in-one delivers strong performance, a gorgeous 4K display and a healthy feature set. The display could be brighter, but overall this is the best all-in-one computer based on our testing.

Read the full Asus Zen AiO Pro Z240IE review.

Acer Aspire Z24

(Image credit: Acer)

2. Acer Aspire Z24

The best all-in-one computer value

Display: 23.8-inch display, 1920 x 1080 resolution | Special Features: Amazon Alexa | Processor: Intel Core i7-8700T | Graphics: Intel UHD Graphics 630

Potent six-core processor provides plenty of oomph
Built-in microphones for Amazon Alexa
Glare-reducing touch screen
Decent bundled keyboard and mouse
Plastic construction
Display limited to 1080p
No discrete graphics option
Slow hard drive

The Acer Aspire Z24 offers a surprising amount of power and some unexpected features, all for under $1,000.  The sleek-looking all-in-one desktop packs a punch, delivering strong processing thanks to a six-core Intel Core i7 processor, backed up with plenty of memory and storage, including 16GB of Intel Optane memory.

The end result is decent all-around performance for the whole family. But the Aspire Z24 has one more trick up its sleeve, with built-in Amazon Alexa support and integrated far-field microphones, giving you a whole range of voice-interaction features.

Read the full Acer Aspire Z24 review.

Apple iMac with 5K Retina Display (27-inch)

(Image credit: Future)

3. Apple iMac with 5K Retina Display (27-inch)

A great all-in-one coputer for photo and video editing

Display: 27-inch, 5120 x 2880 display | Special Features: Siri | Processor: Intel Core i7 processor | Graphics: AMD Radeon Pro 580 graphics

Speedy performance
Plenty of graphics muscle
Brilliant display
Familiar iMac design
No touch option
Awkward port placement
Magic Mouse is inoperable when charging
No height adjustment

The Apple 27-inch iMac with 5K Retina display is the best all-in-one computer for photo and video editors, thanks to its stunning display and potent performance, but it's also a great choice for anyone who wants a capable desktop. Movies and photos look stunningly true-to-life on the iMac's 27-inch, 5120 x 2880 screen, and with a powerful 7th-gen Intel Core i7 processor and AMD Radeon Pro graphics inside, there's plenty of performance muscle to power any of your editing duties. Even with its new upgrades, the latest iMac retains its stunningly slim design, and includes Apple's Magic Mouse and Magic Keyboard.

Read our full Apple iMac with 5K Retina Display review.

Microsoft Surface Studio 2

(Image credit: Future)

4. Microsoft Surface Studio 2

The best all-in-one PC for artists

Display: 28-inch, 4500 x 3000 touch display | Special Features: Pulls down for drawing, included stylus | Processor: Intel Core i7-7820HQ | Graphics: Nvidia GTX 1070

Excellent design lets you use as a desktop or drawing board
Flexible hinge
Excellent display quality
Strong audio
Best-in-class pen support
Inconvenient port placement
Hardware is dated from the start

The Microsoft Surface Studio 2 ($4,199 as tested) is the best thing around for anyone who does digital art, thanks to a gorgeous touchscreen that drops down low for comfortable touch and pen use. The better-than-4K display looks amazing, the touch screen supports both the Surface Pen and Surface Dial and the design is top-notch.

The updated Surface Studio 2 gets beefier processing and graphics hardware, switches to all-solid-state drives for storage, and gets an even better version of the PixelSense display that offers enhanced brightness and contrast. It's one of the best all-in-one computers we've seen, and our top pick for media creators and artists.

Read our full Microsoft Surface Studio 2 review.

Apple iMac Pro

(Image credit: Future)

5. Apple iMac Pro

The ultimate all-in-one computer for pros

Display: 27-inch, 5120 x 2880 display | Special Features: Up to 128GB of RAM | Processor: Intel Xeon W processor (8, 10, 14, 18 core options) | Graphics: AMD Radeon Pro Vega 64

Professional-grade processing and graphics power
Enormous amounts of memory
Sleek design comes in Space Gray
Excellent display
Not user-upgradable
No HDMI ports
No height adjustment
Mouse is inoperable when charging

When it comes to all-in-one computers, they just don’t come more powerful than this. The Apple iMac Pro reclaims to Pro title with way more power than any consumer will ever need, making it the perfect addition to the video studio, the audio engineering booth or the architect’s office. Equipped with a 10-core Intel Xeon processor, workstation grade graphics and a mind-bending 128GB of RAM, this machine is pure power.

Read our full Apple iMac Pro review.

Dell XPS 27 7760

(Image credit: Future)

6. Dell XPS 27 7760

Superb 4K all-in-one with great sound

Display: 27-inch, 3840 x 2160 display (touch optional) | Special Features: Integrated Soundbar | Processor: Intel Core i7-7700 | Graphics: AMD Radeon RX 570

Tremendous sound
Excellent 4K touch screen
Strong performance
Great keyboard and mouse.
Big and heavy design
Nearly inaccessible ports
Awkward webcam placement

The Dell XPS 27 7760 makes an encore as the best sounding all-in-one desktop around. This sweet sounding system has a 27-inch 4K display, potent Intel Core i7 processing, AMD’s latest Radeon RX 570 graphics card and a built-in, 10-speaker soundbar that will blow you away. If you want big, bright sound without an external speaker set, this is the best all-in-one PC to get.

Read our full Dell XPS 27 7760 review.

How we test all-in-one PCs

Every all-in-one we review goes through a variety of benchmark tests in Purch Labs as well as long hours of real-world use. As with our laptop reviews, we use a colorimeter to measure the brightness, color accuracy and color gamut of each all-in-one's display.

For performance, we use the Geekbench 4 test to measure a system's overall processing abilities. We also run a custom spreadsheet test to see how long a PC takes to match thousands of names to addresses. To evaluate each system's hard drive speed, we measure how long it takes to copy 4.97 worth of files.

If an all-in-one has discrete graphics, we run it through many of the same benchmarks we use for gaming PCs. That includes 3DMark Fire Strike, as well as the built-in benchmark tools of games like Rise of the Tomb Raider, Hitman and Grand Theft Auto V. If an all-in-one is made to support virtual reality, we'll also run the SteamVR Performance Test.

Most importantly, we spend a ton of time simply using each all-in-one desktop for everyday activities. We watch movies, do work, play games, and blast music on the speakers, all to get a better sense of which ones are worth your money.

What do all-in-one computers cost?

All-in-One computers run the gamut from affordable to premium pricing. Budget-friendly systems can be found for less than $1000, but will generally be limited to full HD resolution displays and low-powered Celeron and Pentium processors. The best all-in-one desktops can cost $2,000 or more, and boast 4K displays, the latest Intel Core i7 processors and discrete graphics cards from Nvidia and AMD.

Since these units are always plugged in, you might want to also invest in a good surge protector to make sure your all-in-one stays in good shape.