Key takeaways
- An all-in-one desktop answers a simple question: do you want a computer that disappears into the desk, or one you can open up and rebuild later?
An all-in-one desktop answers a simple question: do you want a computer that disappears into the desk, or one you can open up and rebuild later? Everything in this roundup tucks the processor, memory, storage and screen behind a single panel, so the screen size you pick also decides how much machine you get and how little you can change afterward. In 2026 the listings below stretch from a 21.5-inch office unit built around a quad-core Intel N100 to a 27-inch Dell with DDR5 memory and Wi-Fi 6E.
The choice is rarely about raw speed. It is about who sits in front of the screen: a student writing papers, a front-desk worker running a browser and a booking tool, or a family sharing a kitchen computer. The sections ahead sort the listed models by those situations, explain which specs matter most in a single-panel PC, and point out where budget units trim corners. Everything below comes from the listing titles, so when a detail is missing, treat it as something to confirm before ordering.
Quick Picks
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| Product | Best for | Key spec taken from the product title |
|---|---|---|
| Unbranded 24-inch Core i5 AIO | Roomy screen with generous memory | i5 CPU up to 3.3 GHz, 16GB RAM, 256GB SSD |
| Lenovo IdeaCentre 24-inch | Storage-first family computer | 8GB RAM, 512GB SSD, 24-inch FHD anti-glare IPS |
| MECHAZER 27-inch Curved | Biggest panel in the group | Core i7 7700HQ, 16GB DDR3, 512GB SSD |
| HP 21.5-inch N100 | Small desks and light office work | Quad-core Intel N100, 8GB RAM, 8-in-1 docking hub |
| Qehi 24-inch Core i5 | Video calls and home office | Core i5, 16GB RAM, 256GB SSD, HD webcam |
| Lenovo 24-inch FHD Business AIO | Office and home hybrid use | 16GB RAM, 256GB SSD, HDMI, Wi-Fi 6 |
| Dell 27-inch Core 5 120U | Newest platform on the list | 16GB DDR5, 512GB SSD, Wi-Fi 6E |
| HP ProOne 600 G4 | Business-style desk machine | Core i5-8500T up to 3.5GHz, 8GB RAM, Windows 11 Pro |
The 8 Best Options
Unbranded 24-Inch Core i5 All-in-One
This is the plainest pitch in the group, and that plainness is the appeal. It suits a shared household computer where email, streaming, homework and video calls matter more than a famous badge, and where a big screen with a healthy amount of memory beats a long feature list.
The title lists a 24-inch screen, an i5 CPU running up to 3.3 GHz, 16GB of RAM, a 256GB SSD and integrated graphics. It adds that Wi-Fi 6 and Bluetooth arrive through an external adapter rather than a built-in card, and it calls the design space-saving. No brand or model line appears in the visible title, so the buyer leans on the seller for support. Read the return and warranty terms before ordering.
- 16GB of RAM is double what several rivals on this page list.
- A 24-inch panel leaves room for two windows side by side.
- SSD storage keeps boot times and app launches quick.
- 256GB fills fast if the family keeps photo libraries on the machine.
- External wireless uses a USB port and can be knocked loose.
Skip it if you want a recognizable support network behind the screen. The Lenovo IdeaCentre next in line trades half the memory for double the storage, which is the real fork in the road for family buyers. Anyone who plans to keep large photo or video folders on the machine will feel the 256GB limit within a year, while a buyer who lives in the browser and cloud documents may never miss the extra space.
Lenovo IdeaCentre 24-Inch All-in-One
This one is a sensible fit for a kitchen or living-room computer where several family members sign in. Anti-glare IPS panels hold up better beside a window than glossy ones, and a roomy SSD means nobody has to delete school projects to make space for the next one.
The listing pairs an Intel 4-core processor with 8GB of RAM and a 512GB SSD behind a 24-inch FHD anti-glare IPS display. Wi-Fi 6 and Bluetooth 5.2 are named, and Windows is preinstalled. The title does not name the exact Intel model, so the processor generation is unknown, which makes the memory and storage figures the clearer guide.
- 512GB of SSD space gives real room for documents, downloads and school projects.
- IPS panel type is the better choice for viewing angles when two people look at the screen.
- Bluetooth 5.2 and Wi-Fi 6 are built into the listing, with no adapter to plug in.
- 8GB of RAM is the minimum comfortable amount; many open browser tabs will push it.
- The unnamed Intel model makes it hard to rank against the Core i5 units.
Skip it if you keep dozens of tabs open all day. Compared with the MECHAZER 27-inch that follows, it offers a smaller screen but a far more current-looking spec sheet and a brand with a service network. Families that share one login for everything will care more about the storage and the glare-resistant screen than about the exact CPU generation.
MECHAZER 27-Inch Curved All-in-One
This is the screen-size play. A large curved panel is appealing for spreadsheets, media and casual viewing from an arm’s length away, and it makes the most visual impact on a desk of any model in the group. It is aimed at a single user who wants a big canvas for office work and video.
The title lists a 27-inch curved FHD display, a Core i7 7700HQ, 16GB of DDR3 memory, a 512GB SSD, Bluetooth 5.3 and dual-band Wi-Fi. The processor and memory type are the two details to read twice: the 7700HQ is a seventh-generation part and DDR3 is a previous memory standard, so the platform is older than the shell around it suggests.
- 27 inches is the largest display among the listed models.
- 16GB of RAM and a 512GB SSD are both generous for the tier.
- Bluetooth 5.3 is the newest version named in this roundup.
- Older-generation parts mean an aging platform under a modern-looking shell.
- DDR3 memory is harder to find and upgrade than DDR4 or DDR5.
Skip it if long-term software support matters to you. The HP N100 that follows has a newer processor family but a much smaller screen, so the choice is size now versus a fresher platform. A buyer who replaces computers every few years may accept the older chip for the sake of the display, while someone planning a long ownership period should lean toward the newer designs further down the page.
HP 21.5-Inch FHD All-in-One With Docking Hub
The compact size and included dock make this a natural reception-desk or classroom machine, where ports for cards, drives and peripherals are handy and the workload is a browser, documents and a booking or inventory tool. It is the smallest panel among the models reviewed here.
HP lists a 21.5-inch FHD display, a quad-core Intel N100, Windows 11, 8GB of RAM, a keyboard and mouse in the box, and an 8-in-1 docking hub. The storage figure shown is 384GB, though the title cuts off before naming the drive type, so confirm that before buying. The white finish is also mentioned.
- The included docking hub adds ports without buying a separate accessory.
- A keyboard and mouse ship with it, so setup is plug-in-and-go.
- The 21.5-inch footprint suits tight counters.
- N100 is an entry-level chip; plan on browsing, documents and video, not heavy multitasking.
- 8GB of RAM leaves little headroom for many open apps.
Skip it if you edit photos or run many apps at once. Compared with the Qehi next, it gives up memory and webcam emphasis but adds the dock and the bundled peripherals. In a classroom or lobby where several people share one machine, that included hub can matter more than another few gigabytes of memory.
Qehi 24-Inch Core i5 Business AIO
If your week is mostly video meetings, shared documents and a browser, this is the one to look at. It is pitched at home offices and small businesses, and the webcam is part of the headline rather than an afterthought.
The Qehi title promises a 24-inch FHD 1080P panel, a Core i5, 16GB of RAM, a 256GB SSD, an HD webcam for clear calls and Wi-Fi 6. A sizing quirk is worth noting: the title mentions both 24 inches and 23.8 inches, which usually means the viewable diagonal is the smaller number. Confirm the actual panel size and port list in the description.
- 16GB of RAM supports a call, a browser and a document at once.
- The webcam is named in the title, so no separate camera purchase is needed.
- Core i5 positioning sits above the entry-level chips on this list.
- 256GB of storage is modest for long-term use.
- Lesser-known brand, so check the warranty terms and support contact.
Skip it if you need lots of local storage or a name-brand support desk. Against the Lenovo business model next, it puts more weight on the webcam and a named processor tier, while Lenovo offers the more familiar brand. If you rarely join calls and prefer a monitor-first purchase, the webcam advantage shrinks and the brand question becomes the main tiebreaker.
Lenovo 24-Inch FHD Business All-in-One
This model targets a shared space where a name brand and a straightforward spec list matter more than extras. Think of a home that doubles as a small office, where one machine handles paperwork by day and streaming by night.
The Lenovo is described as a 24-inch FHD all-in-one for office and home, with an Intel processor, 16GB of RAM, a 256GB SSD, HDMI, Wi-Fi 6 and Bluetooth 5.2. The title says only Intel, with no model number, so performance is hard to pin down. What it does state clearly is the combination of 16GB of memory and wireless features that match the more expensive picks.
- 16GB of RAM matches the Qehi and the unbranded i5 unit.
- An HDMI port is named, which can help when connecting a second source.
- Wi-Fi 6 and Bluetooth 5.2 are built in.
- The processor is not identified beyond Intel, so ranking it is guesswork.
- 256GB of SSD space will feel tight over time.
Skip it if you want to know the exact CPU before paying. It sits one step below the Dell in platform age, which is the next review, but it is likely a gentler step on the budget. For a spare-room computer used a few hours a week, that trade is easy to justify, since the memory amount is already at the 16GB target.
Dell 27-Inch All-in-One With Core 5 120U
This is the most current platform in the roundup and the best candidate for someone who wants the machine to stay relevant for several years. It targets buyers who value a larger screen and are willing to pay for newer memory and wireless standards.
Dell lists a 27-inch FHD display, an Intel Core 5 120U, Windows 11 Home, Intel graphics, a 512GB SSD, 16GB of DDR5 memory, Wi-Fi 6E, Bluetooth, and a keyboard and mouse. DDR5 is the newest memory type named anywhere in this guide, and Wi-Fi 6E adds access to the 6 GHz band if your router supports it.
- DDR5 memory and Wi-Fi 6E are the newest standards named here.
- A 27-inch screen with a 512GB SSD and 16GB of RAM is a balanced combination.
- Keyboard and mouse come with it.
- It is likely the most expensive model on the page, so budget buyers may look elsewhere.
- Intel graphics rule out serious gaming or 3D work.
Skip it if the lowest cost matters most. Next to the HP ProOne, it has a far newer platform but a very different intended buyer, since the ProOne leans toward business desks and small footprints. If the goal is a screen that feels new on day one and still feels acceptable late in the decade, the Dell is the safer bet in this group.
HP ProOne 600 G4 21.5-Inch
The ProOne is a business-line machine, and the T-suffix processor and business lineage suggest an office desk machine rather than a living-room one. It suits IT-managed environments, front offices and any desk where a small, quiet unit with Pro licensing is the goal.
The title lists a 21.5-inch FHD monitor, a Core i5-8500T that runs up to 3.5GHz, 8GB of RAM, a 256GB SSD, Wi-Fi and Windows 11 Pro. Eighth-generation Core chips are still within Microsoft’s official Windows 11 support list, which matters for long-term updates. The memory and storage figures are the smallest on this page.
- Windows 11 Pro supports business features such as domain join.
- An 8th-generation Core i5 is a known quantity for office work.
- The compact 21.5-inch panel fits crowded workspaces.
- 8GB of RAM and 256GB of storage are the smallest figures on this list.
- The platform is several generations behind the Dell.
Skip it if you want a big, modern display or lots of storage. It is the right pick only when a business-style small unit with Pro licensing is the goal. As the last pick, it closes the list at the practical, no-frills end. Buyers who manage several identical office desks may value that predictability, while home users will usually find the 24-inch models more comfortable day to day.
Who Needs an All-in-One Instead of a Tower
Small homes and shared rooms
If the computer lives in a kitchen, a hallway nook or a studio apartment, a single cable to the wall is a real advantage. There is no tower to hide, no monitor stand to match and no separate speakers needed for basic audio. Households with children often prefer the tidy footprint because there are fewer cables to tug and fewer parts to lose. A single power brick also makes it easier to move the machine between rooms when the desk is needed for something else.
Reception, classroom and small-office counters
Counters rarely have space for a monitor, a tower and a keyboard tray. A 21.5-inch or 24-inch unit with a webcam, like the Qehi or the HP N100, answers the front-desk job with one box. Managers also like that one part number covers the whole workstation, which simplifies replacement when something fails. Cleaning is easier too, because there is no tower collecting dust on the floor behind a reception desk.
People who will never open the case
If you do not plan to swap a graphics card or add drives, the main argument for a tower disappears. Buyers who browse, stream, video call and write documents are paying for a screen and a base unit either way, so a single-panel design wastes less desk space. The people who should look elsewhere are gamers, video editors and anyone who wants to upgrade piece by piece over the years.
How to Choose
Processor generation matters more than the name
Look for the full model number. An i5 can be a recent chip or one from several years ago, and the gap in daily responsiveness is real. For general use, a quad-core processor is the floor, and six or more cores is comfortable for heavy multitasking. Entry-level chips such as the Intel N100 cope with browsing, documents and video, but they are not a match for a Core i5 running a long list of tabs plus a call. Be wary of titles that say only Intel Processor or quote an up-to clock speed without a model number.
Memory: 8GB is the floor, 16GB is the target
Modern browsers and Windows 11 use memory freely. 8GB works for single-task use, while 16GB is the number to look for if you keep many tabs open, run a video call alongside documents, or want the machine to last. Also check the type: DDR3 is old, DDR4 is common and DDR5 is current. Many all-in-ones have limited or no user-accessible memory slots, so buy the amount you need on day one rather than planning to upgrade.
Storage: SSD only, and 512GB if you can
Anything with a spinning hard drive as the main disk will feel slow. A 256GB SSD is workable for a lean work computer, but Windows updates, apps and downloads shrink it faster than most people expect. A 512GB drive is the more comfortable tier, and 1TB is worth it if you store photos or video locally. Cloud storage and an external drive can fill gaps, but they add the clutter that an all-in-one is meant to avoid.
Screen size, resolution and panel type
FHD (1920 x 1080) is the minimum worth buying on 21.5 to 27 inches. IPS panels give better viewing angles and color than TN, and an anti-glare finish helps in bright rooms. A 19-inch TN panel is fine for a kiosk but tiring for daily office work. Curved screens suit solo use better than shared viewing. If a listing quotes two slightly different sizes, such as 24-inch and 23.8-inch, the real viewable area is the smaller one.
Ports, wireless and webcam
Count the USB ports and see whether any are USB-C. Look for Wi-Fi 6 or better and Bluetooth 5.0 or newer. A built-in webcam matters if you work from home, but a fixed camera cannot be repositioned, so check whether a privacy shutter exists. External Wi-Fi adapters are a sign of a corner cut, because they take up a port and add a failure point. If your office is wired, an Ethernet jack is worth confirming.
Warranty, operating system and where budget models cut corners
Prefer a brand with a clear warranty and a support site you can find. Windows 11 Pro helps if you need business features; Home covers most families. Ignore headline numbers such as up-to clock speeds, marketing about speakers, and bundled extras you will not use. Treat the first week as a trial: if the stand wobbles, the fan whines or the panel looks washed out, use the return window. Budget models usually cut corners on memory capacity, panel quality, port count and support rather than on the shell, so inspect those lines first. A low-tier unit with a TN panel, 8GB of RAM and a small drive can still do the job, but it will age faster than a mid-range one with 16GB and an IPS display. Compact cases pack the processor behind the screen, so look for any mention of fan design or low-power chips. T-suffix and N-series processors draw less power and tend to run quieter, while higher-wattage mobile chips can spin up under load. Also check whether the base is height-adjustable or fixed; a fixed stand that puts the top edge below eye level is a common comfort complaint, and a VESA mount, if supported, solves it.
All-in-One vs Mini PC With a Separate Monitor
The real competitor to an all-in-one is not a tower; it is a mini PC plugged into a monitor you choose yourself. Both save space, but they differ in flexibility and long-term cost.
| Factor | All-in-one | Mini PC plus monitor |
|---|---|---|
| Desk footprint | One unit, one power cable | Small box plus a monitor, two cables |
| Screen replacement | Whole machine must be replaced | Swap the monitor on its own |
| Upgrade path | Limited, often none | Often RAM and SSD slots |
| Webcam and speakers | Usually built in | Bought separately |
| Repair | Tricky, brand service often needed | Easier to replace one part |
| Best fit | Shared rooms, counters, simple setups | Users who like choosing a monitor |
When the single-panel design wins
It wins when tidiness and a one-box setup matter more than a custom screen. A webcam, speakers and Wi-Fi are already in the case, and setup takes minutes. For a family computer or a counter workstation, that simplicity is the product, and it is why a buyer who has never built a PC is often happier with one. It also suits households that move a lot, because nobody has to figure out which cable goes where after a move.
When the split setup wins
The split setup wins when the monitor is expected to outlive the computer. A good monitor can serve two or three machines in a row, while an all-in-one’s screen is stuck with its processor. If you are the sort of buyer who wants to change panel size, add a second screen or swap memory later, a mini PC and separate monitor give more room to grow, and a failed part costs less to replace than a whole unit. The trade-off is clutter: two power cables, a separate webcam and speakers if you want them, and a larger overall footprint than the single-panel route.
Setup, Compatibility and Upgrade Tips
What to check before buying
Confirm the exact processor model, the memory type and the real panel size. Look at the port list for HDMI, USB-C and an Ethernet jack if your office is wired. Check whether the keyboard and mouse are included, and whether the operating system is Home or Pro. If a title lists a business-line machine, look for a stated warranty period, and measure the desk space including the stand depth. Also confirm the power source: a few units use an external adapter, which needs a spot on the floor or under the desk.
What to upgrade first
On most single-panel PCs, the first practical upgrade is an external drive or cloud storage, because internal access is limited. If the case allows it, memory is the next best upgrade. Peripherals are the cheap wins: a better keyboard, a mouse that fits your hand and a pair of headphones often improve daily comfort more than any internal change. A webcam cover or a simple external speaker can also help. Before the first big software install, run Windows Update fully, because the preloaded image on any unit may be months old and drivers for Wi-Fi and the display often arrive in those updates.
Common compatibility traps
Watch for DDR3 memory, which cannot be mixed with newer modules, and for external Wi-Fi adapters that occupy a USB port. Some units use proprietary power bricks, so a lost charger may be hard to replace. Older processors may not be supported by the newest Windows releases, so confirm that the preinstalled system is activated and updated. Finally, check whether an HDMI port is an output only; many all-in-ones cannot act as a monitor for another device, and a router that lacks the 6 GHz band will not unlock Wi-Fi 6E speeds.
Which One Fits Your Situation
A shared family computer with homework and streaming
The Lenovo IdeaCentre 24-inch fits best here. Its 512GB SSD absorbs school files, and the anti-glare IPS screen copes with a bright room where children and adults take turns at the keyboard.
A home office with daily video calls
The Qehi 24-inch with its named webcam and 16GB of RAM is the pick. It gives you a camera, a Core i5 and memory headroom in one case, so a call and a document can sit open together.
A buyer who wants the most current platform
Choose the Dell 27-inch with the Core 5 120U, DDR5 and Wi-Fi 6E. It is the only listing here that points clearly toward longevity, and the bundled keyboard and mouse mean it is ready to use on arrival.
A tight front-desk counter
The HP 21.5-inch N100 with its docking hub is the match. Its small footprint and included ports make it straightforward for light office tasks, and the bundled peripherals shorten setup.
Common Mistakes
- Buying on screen size alone and ignoring the processor generation behind it.
- Accepting 8GB of RAM on a machine whose memory cannot be upgraded.
- Assuming a listing with an up-to clock speed tells you how fast the chip really is.
- Overlooking the small print on panel type and choosing a TN screen for all-day work.
- Forgetting that an all-in-one’s screen and computer age together.
- Skipping the warranty terms on lesser-known brands.
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Frequently Asked Questions
Can you upgrade the RAM in an all-in-one?
It depends on the model. Some have an access panel to memory slots, while others have soldered memory or require opening the case. Check the manufacturer’s documentation, and buy the amount you need on day one if the listing does not say.
Is an all-in-one good enough for gaming?
The units listed here rely on onboard graphics, so they suit casual and older games rather than modern titles. For serious gaming, a tower or a gaming laptop with a dedicated graphics card is a better route.
How much RAM does an all-in-one need?
8GB is fine for light use, but 16GB is the number to look for if you keep many tabs open or video call while working. Newer memory types such as DDR5 also offer more headroom for the future.
Is a 19-inch all-in-one worth considering?
Only for narrow jobs such as a kiosk or a small cash desk. For daily work, 21.5 inches is a sensible minimum, and 24 inches is more comfortable for long sessions.
Do all-in-ones include a keyboard and mouse?
Some listings include them, such as the HP N100 and the Dell, but many do not. Read the title and description carefully, and budget for a keyboard and mouse if they are missing.
Can an all-in-one be used as a second monitor?
Usually not. Most models have only an HDMI output or no video input at all, so they cannot act as a display for another computer. Confirm with the manufacturer before relying on that feature.
Final Words
An all-in-one rewards the buyer who knows the job in advance. If you want a roomy screen, a webcam and a tidy desk, the 24-inch group of Lenovo, Qehi and the unbranded Core i5 covers the core ground. If you want the longest runway, the Dell 27-inch with DDR5 stands out. The cheaper tiers lean on older processors, small drives and limited memory, so read the processor line before the screen size. Based on the listed specs, match the memory and storage to your daily routine, then let screen size and brand support break the tie. Keep the return window in mind as well, since a first week of real use will reveal glare, fan noise or a cramped stand faster than any spec sheet can.
