A desktop computer is a personal computer designed to stay in one place, usually on or under a desk, and run on wall power. Most desktops pair a separate case with an external monitor, keyboard, and mouse, while all-in-one models build the computer into the display. Desktops handle everything from browsing and schoolwork to gaming, video editing, and business work.
Below, we cover how desktops work, the main types, and what to check before you choose one. Each section links to a more detailed page in our desktop glossary.
Desktop Computer Essentials at a Glance
A stationary personal computer that typically runs on wall power rather than a battery
Comes in several form factors, including towers, all-in-ones, small form factor desktops, and mini PCs
Uses the same core components as other PCs: a processor, memory, storage, and graphics
Offers different amounts of room for cooling, ports, and upgrades depending on the form factor
Usually needs a separate monitor, keyboard, and mouse, unless it is an all-in-one computer
How Does a Desktop Computer Work?
A desktop works like any personal computer. The central processing unit (CPU), or processor, carries out instructions. Random access memory (RAM) temporarily holds data for the tasks you are working on. Storage, such as a solid-state drive (SSD) or hard disk drive (HDD), keeps your files, apps, and operating system when the power is off.
A graphics processor draws everything you see on screen. It can be integrated into the CPU or sit on a dedicated graphics card. All of these parts connect through the motherboard and draw power from a power supply, while fans and heatsinks carry heat away.
Because a desktop runs on wall power and isn't built to be carried, many models can use higher-wattage components and larger cooling systems. You can learn how desktop memory and storage work together or read more about how processors handle everyday and demanding tasks.
What Is a Desktop Computer Used For?
Desktops suit tasks you do in one place, especially ones that benefit from a large screen, a full-size keyboard, or sustained performance. Common uses include:
Home and family computing: browsing, streaming, photo storage, and homework on a shared computer
Work and home office: documents, spreadsheets, video calls, and multi-monitor setups
Gaming: dedicated graphics and cooling built for long play sessions
Creative work: photo and video editing, music production, and 3D design
Technical and professional workloads: engineering, data analysis, and rendering on workstation-class systems
Business and education: managed computers in offices, classrooms, libraries, and front desks
Organizations have extra needs around security and fleet management, which we cover in our guide to business desktops. To match a desktop to your own tasks, see desktops by use.
What Are the Different Types of Desktop Computers?
Desktops come in several form factors. Form factor describes a computer's size, shape, and layout, and it affects how much room there is for components, cooling, and future upgrades. Our guide to computer form factors explains the sizes in more depth.
Tower desktops
A tower desktop houses its components in an upright case that sits on or under a desk. Towers range from slim and micro towers to larger mid and full towers. Bigger cases generally offer more expansion slots, drive bays, and airflow, which makes towers the most upgradeable desktop type.
Our HP OmniDesk desktops, for example, include standard and slim tower designs for everyday home use. Learn more about tower desktop sizes and features.
All-in-one computers
An all-in-one (AIO) computer builds the processor, memory, and storage into the display housing. Most AIOs also include speakers and a webcam. One unit means fewer cables and a smaller footprint.
The trade-off is flexibility. You can't replace the display separately, and internal upgrade options vary by model. HP OmniStudio X All-in-One desktops come in 27-inch and 31.5-inch sizes. Read more about how all-in-one computers work.
Mini PCs and small form factor desktops
Small form factor (SFF) desktops shrink the tower into a compact case that fits on a desk or under a monitor. They usually keep some room for internal upgrades. Mini PCs go smaller still, and many can mount behind a compatible monitor.
Both work well for everyday tasks, offices, and tight spaces, with fewer expansion options than a tower. See the space-saving advantages of small form factor PCs or learn what a mini PC can handle.
Specialized desktops: gaming PCs and workstations
Gaming desktops are usually towers built around a dedicated graphics card, a fast processor, and cooling designed for long sessions. Many also leave room to upgrade the graphics card later. Explore what sets gaming desktops apart or browse HP gaming desktops.
Workstations are professional-grade desktops for demanding software, such as computer-aided design (CAD), 3D rendering, and data science. They often support professional graphics, large memory capacities, and certifications from independent software vendors (ISVs). Our HP Z desktop workstations come in tower, small form factor, and mini designs. Learn more about desktop workstations and how a workstation differs from a standard desktop.
Tower vs. All-in-One vs. Mini PC: How Desktop Types Compare
The main differences between desktop types come down to size, display, and how much room they leave for cooling and upgrades. Towers offer the most flexibility, all-in-ones keep everything in one unit, and small form factor desktops and mini PCs save the most space.
Feature | Tower desktop | All-in-one computer | Small form factor desktop or mini PC |
Footprint | Case plus monitor | One unit on a stand | Compact case; many mini PCs can mount behind a monitor |
Display | Separate monitor of your choice | Built-in display | Separate monitor of your choice |
Keyboard and mouse | Separate | Separate, often included | Separate |
Graphics options | Integrated graphics or a full-size dedicated graphics card | Integrated graphics, or dedicated graphics on select models | Mostly integrated graphics; some small form factor models accept compact graphics cards |
Upgradeability | Highest; many models accept memory, storage, and graphics card upgrades | Limited; varies by model | Moderate on small form factor models; limited on most mini PCs |
Cooling headroom | Most room for airflow and larger coolers | Moderate; limited by the display housing | Limited by case size |
Often chosen for | Gaming, demanding work, multi-monitor setups, future upgrades | Clean home and office setups, shared family computers | Offices, small spaces, everyday tasks |
Specifications vary by model, so check the product details before you buy. For a deeper look, compare desktop PCs, all-in-ones, and workstations or see more desktop comparisons.
What Should You Consider When Choosing a Desktop?
Start with what you'll do on the computer, then match the form factor and specs to it.
How you'll use it: Browsing and schoolwork need far less power than gaming, video editing, or 3D work. Size your choice to your most demanding regular task.
Space and form factor: A tower needs room for the case and a monitor. An all-in-one or mini PC frees up desk space.
Processor and graphics: Integrated graphics handle everyday tasks and video streaming. Gaming and creative work benefit from a dedicated graphics card.
Memory and storage: More RAM helps with multitasking, and an SSD speeds up startup and app loading. Plan storage around the size of your files, photos, and games.
Ports and connectivity: Count the USB ports, display outputs, and network options you need. Not every desktop includes Wi-Fi, so check the specs if you won't use a wired connection.
AI features: Some newer desktops include a neural processing unit (NPU) that runs AI features on the device. Learn what makes a PC an AI PC.
Monitor and accessories: Most towers and mini PCs don't include a display. Factor in a monitor, keyboard, and mouse if you need them.
Budget: Include any monitor and accessories in your total. Our budget desktop guide explains where to spend and where to save.
When you're ready to compare models, you can check current configurations and pricing on the HP Store desktop page.
Understanding Desktop Specs and Components
A desktop spec sheet lists the processor, memory, storage, graphics, ports, wireless options, and operating system. On towers, it may also list the power supply and available expansion slots. These two lines matter if you plan to upgrade, because the power supply's wattage and connectors can limit which graphics cards you can add later.
Remember how memory and storage differ when you compare: RAM holds data for active tasks, while storage keeps your files and applications. Our desktop specs guide explains each line of a spec sheet, and our desktop connectivity guide covers ports, Wi-Fi, and Bluetooth.
Setting Up, Upgrading, and Maintaining a Desktop
Setup is simple, but a few steps make a difference. If your desktop has a dedicated graphics card, connect your monitor to the graphics card's outputs rather than the motherboard's. Then install operating system updates and set up backups and security before you move files over.
Memory and storage are the most common upgrades, and towers can often take a new graphics card too. Before opening the case, check compatibility and your product's warranty terms. Our guide to desktop upgrades walks through what you can change.
For ongoing care, keep vents clear of dust and walls, and plug the desktop into a surge protector. Keep drivers and firmware up to date so hardware and security features keep working as intended.
Frequently Asked Questions About Desktop Computers
What is the difference between a desktop and a PC?
A PC, or personal computer, is any computer designed for one person to use at a time. A desktop computer is one type of PC, built to stay in one place. Laptops, all-in-ones, and mini PCs are also PCs. In everyday speech, "PC" often refers to a Windows computer.
Does a desktop computer come with a monitor?
Most tower desktops, small form factor desktops, and mini PCs do not include a monitor. All-in-one computers have a built-in display. Check the product specifications to confirm whether a monitor, keyboard, and mouse are included.
Can a desktop computer connect to Wi-Fi?
Many desktop computers include built-in Wi-Fi and Bluetooth, but some models rely on a wired Ethernet connection. A desktop computer without built-in Wi-Fi can connect wirelessly through a USB Wi-Fi adapter or, on many towers, an internal wireless card.
How long does a desktop computer last?
A desktop computer's useful life depends on how it is used, how well it is maintained, and how long its operating system and software remain supported. Upgrading memory or storage and installing regular updates can keep a desktop computer useful for longer.
Can a desktop computer use more than one monitor?
Many desktop computers support two or more monitors. The number depends on the display outputs available on the motherboard and graphics card, so check the ports listed in the product specifications. Desktop computers with a dedicated graphics card often offer more display outputs. Learn more about setting up multiple monitors.
Explore the Desktop Glossary
Tower desktops: case sizes, upgrade room, and who towers suit
All-in-one computers: built-in displays and space-saving setups
Mini PCs: compact desktops for everyday tasks and small spaces
Desktop specs: how to read a desktop spec sheet
Desktop memory and storage: RAM, SSDs, and HDDs in desktops
Desktop upgrades: what you can add or replace
Desktop connectivity: ports, Wi-Fi, Bluetooth, and display outputs
Desktop comparisons: side-by-side looks at desktop types and alternatives
Desktops by use: matching a desktop to home, work, school, or creative tasks
Budget desktops: getting the most value for your money
