Key takeaways
- Buying the lowest-memory model of a non-upgradeable all-in-one, then being stuck with it.
- Choosing a thin AIO for gaming; most use laptop-class chips with limited cooling.
- Ignoring ports, since the back panel can be hard to reach once the unit is on a desk.
- Forgetting that a broken screen means servicing the whole machine.
The best all-in-one PC for most people in 2026 is the Apple iMac 24-inch with the M4 chip, and the best Windows choices are the HP OmniStudio line for creators and the Lenovo IdeaCentre AIO 27 for value. An all-in-one folds the display, computer, speakers and webcam into one unit with a single power cable, so it suits desks where tidiness matters more than upgrades. Most all-in-ones cannot be opened up and upgraded, so buy the memory and storage you need on day one.
This guide compares real all-in-one PCs by screen, processor class and upgrade options, adds a size-and-use decision table, and explains the trade-offs against a mini PC with a monitor. Information comes from manufacturer specs and published professional reviews, not personal use.
Our top picks
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Quick Comparison of the Best All-in-One PCs
| Pick | Best for | Key specs | Price range |
|---|---|---|---|
| Apple iMac 24-inch (M4) | Best overall | 24-inch 4.5K Retina display, Apple M4 chip, built-in speakers and camera | Upper mid-range |
| HP OmniStudio X 27 / 31.5 | Best for creators on Windows | Large high-resolution display, up to Intel Core Ultra 7, dedicated NVIDIA graphics option | Premium |
| HP OmniStudio 24 / 27 | Best mid-range Windows AIO | Slim body, AMD Ryzen AI or Intel options, 100Hz panel on some configurations | Mid-range |
| Lenovo IdeaCentre AIO 27 | Best Windows value | 27-inch display, Intel or AMD CPU options, upgradeable memory and storage in some versions | Budget to mid-range |
| Lenovo Yoga AIO 27 | Best Windows alternative to the iMac | Larger 120Hz screen, flexible stand | Mid to upper range |
Best Overall: Apple iMac 24-inch (M4)
Tom’s Guide calls the iMac the best all-in-one you can buy, combining a 24-inch 4.5K Retina display with fast performance and good speakers. The Apple M4 chip handles office work, photo editing and light video work without noise. It suits families, home offices and anyone who wants one clean piece of hardware.
Trade-off: macOS only, memory and storage cannot be upgraded after purchase, and the screen size is fixed at 24 inches.
Best for Creators on Windows: HP OmniStudio X
TechRadar recommends the OmniStudio X 31.5 as an iMac alternative for creative work, and Memeburn picks the OmniStudio X 27 for creators who want upgradeable RAM and dedicated graphics. Configurations go up to an Intel Core Ultra 7 processor and NVIDIA RTX 4050 graphics, which help in photo, video and 3D workloads.
Trade-off: premium pricing and a larger footprint than the iMac.
Best Mid-Range Windows AIO: HP OmniStudio 24 and 27
The standard OmniStudio family offers slim designs with newer AMD Ryzen AI and Intel processors. Reviewers list the 23.8-inch model with a 100Hz panel as a budget-friendly pick. It suits households and small offices that want a modern look, a good webcam and some AI-ready features.
Trade-off: not meant for heavy graphics work, and configuration names vary between regions.
Best Windows Value: Lenovo IdeaCentre AIO 27
Reviewers describe the IdeaCentre AIO 27 as a value leader for Windows buyers, with a capable processor, a good webcam and decent audio at a lower price. Several versions allow the user to replace the memory and storage later, which extends its useful life.
Trade-off: the display is less color-accurate than the iMac or OmniStudio X, and audio is only decent.
Best iMac Alternative: Lenovo Yoga AIO 27
Memeburn and Tom’s Guide name the Yoga AIO 27 as the best Windows alternative to the iMac, with a larger 120Hz screen and a stand that adjusts well. It is a good choice if you want a bigger, smoother display for productivity and streaming.
Which All-in-One Fits You? Decision Table
| Your situation | Choose | Reason |
|---|---|---|
| Family computer, quiet and tidy | iMac 24-inch | Silent, all-in-one, great screen |
| Photo and video work on Windows | HP OmniStudio X | Dedicated graphics and large display |
| Tight budget, Windows needed | Lenovo IdeaCentre AIO 27 | Lower cost, some upgrades |
| Want a big, smooth display | Lenovo Yoga AIO 27 | 27-inch 120Hz panel |
| Want to upgrade parts later | A mini PC plus monitor | Swap components freely |
All-in-One vs Mini PC With a Monitor
An all-in-one saves cables and looks clean. A mini PC with a separate monitor costs about the same, but the monitor can be reused with a future computer, and many mini PCs let you add memory or storage. A rough size comparison: a 27-inch all-in-one footprint is about 24 inches wide, while a mini PC adds only a hand-sized box behind a 27-inch monitor you may already own. If you already have a good monitor, a mini PC is usually the better value.
How to Choose an All-in-One PC
Screen size and resolution
24 inches suits small desks. 27 inches gives more room for documents. Look for at least QHD (2560 by 1440) at 27 inches; Full HD looks soft at that size. Resolution matters more than refresh rate for office use.
Processor
Entry chips such as Intel Core 5 or AMD Ryzen 5 are fine for web and office. Core Ultra 7 or Ryzen 7 helps with photo editing and multitasking. Check if the model uses a laptop-class chip, which is normal for slim all-in-ones.
Memory and storage
16 GB of memory and a 512 GB SSD is a good starting point. If the memory is soldered, buy more than you think you need.
Ports and webcam
Check the number of USB ports, HDMI input if you want to use the screen with a console, and a privacy shutter on the webcam. Rear ports are awkward to reach on thin designs, so a hub can help.
Stand adjustability
Height and tilt matter for ergonomics. Some budget AIOs offer tilt only. Consider the VESA mount option if you need an arm.
Common Mistakes
- Buying the lowest-memory model of a non-upgradeable all-in-one, then being stuck with it.
- Choosing a thin AIO for gaming; most use laptop-class chips with limited cooling.
- Ignoring ports, since the back panel can be hard to reach once the unit is on a desk.
- Forgetting that a broken screen means servicing the whole machine.
Frequently Asked Questions
What is the best all-in-one computer in 2026?
Most professional reviews pick the Apple iMac 24-inch M4 as the best overall. For Windows, the HP OmniStudio and Lenovo IdeaCentre or Yoga AIO models are the most common recommendations.
Can I upgrade an all-in-one PC?
Some can, but many cannot. The iMac has no user-upgradeable memory or storage, while some Windows models let you replace RAM or an SSD. Check the specs before you buy.
Are all-in-one PCs good for gaming?
Most are not, because they use laptop-class chips with limited cooling. Creator models with dedicated graphics can handle some games, but a desktop tower is a better gaming value.
Do all-in-one PCs last as long as desktops?
They often last about five years or more for office use, but repair is harder because parts are integrated. A failed display or motherboard can mean replacing the entire unit.
Can I use an all-in-one as a monitor?
Only if it has an HDMI or DisplayPort input, which is rare. Most all-in-ones cannot be used as an external display.
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