Thinking of getting a desktop PC? You’ll need to make sure you're picking a computer that's powerful enough to run all your must-have work programs, any cool creative apps you love, and maybe even your favourite games.
You could easily spend hours browsing desktop PCs. But to save you some time, we've done all the hard thinking for you. So, here are the five key things to consider when buying a new computer. From which operating system you’ll want to run everything on, to how much RAM and built-in storage you'll need.
1. What computer operating system is best for me?
The first thing to think about is which type of OS (operating system) is right for you. And there are two main contenders to choose between — Microsoft's Windows and Apple's macOS. Here's how they stack up:
Microsoft Windows
Best for: Office workers, gamers, and general everyday users who want flexibility.
Windows is the world's most popular operating system. It's versatile, compatible with loads of software, and works on a huge range of computing hardware. And it's quite the task master! Whether that’s for work-related stuff, or for those times you want to unwind indulging in a game or streaming that show everyone's talking about.
Windows 11 comes packed with lots of handy features to help you stay connected and get more done. Our favourites include Microsoft Teams, customisable desktops, plus a clever Ai-powered assistant in Copilot. And with Microsoft Office 365, you get handy productivity programs like Word, Excel, PowerPoint and Outlook included. If you want to take a deeper dive, here’s a quick window into Windows 11.
Apple macOS
Best for: Creative professionals and anyone already using Apple devices.
If you have an iPhone or iPad, you might want to go for an Apple iMac running on macOS. By using the same Apple ID across your Apple tech, you can seamlessly switch between your devices as all your important data will be shared, updated, and backed up across them. This can include your contacts, photos, emails, notes, calendar events, and much more.
iMac computers are also famous for their user-friendly interfaces, are great for multitasking, and have strong security features already built in. They're a go-to choice for creative professionals, with Apple exclusive apps like Final Cut Pro and Logic Pro offering incredible video and music editing features.
2. How much RAM and power will my computer need?
RAM (Random Access Memory) is basically your computer’s short-term memory. It stores the latest info your machine's been using so that it can be accessed again quickly. This means that it plays a big part in how fast your PC feels when running programs and multitasking.
In short — the more you’re doing, the more RAM you'll need. For simple everyday tasks, 4GB of RAM should be perfectly fine. But for more complex or creative jobs, extra RAM will be needed to keep things running smooth on your desktop computer:
4GB RAM: This is enough for basic stuff like web browsing, using Word processors, and sending emails.
8GB RAM: A solid choice for video streaming, multitasking for work, and some casual gaming.
16GB RAM: Ideal for heavier tasks like online gaming, video editing, or working with large sets of data.
32GB or more: More than what most people will need, but great for professionals running resource-intensive programs.
If you’re still unsure about which is best for you and your needs, 8GB of RAM is a decent middle ground. And remember — computer memory can be upgraded later if you need a little more oomph!
3. What's the ideal storage capacity of a desktop computer?
Storage is where all your files, apps, and operating system live — measured in megabytes (MB), gigabytes (GB), and terabytes (TB). The amount you'll need for your desktop PC will depend on how many files and programs you’ll be saving and the size of them.
Text files (like Word docs) are small and won’t take up too much room. But photos, music, and video files are much larger and will require extra storage space. Most desktop PCs will have up to 1TB of built-in storage, which can store around 16,660 hours of music / 320,000 photos / 1,000 hours of video / 250 HD movies. But specialist gaming PCs will offer up to 2TB as games take up more space.
If you get a desktop with less storage onboard (512GB or 256GB), know that you can:
Buy an external hard drive to store larger files on, which you can also use to regularly back up your computer's data.
Offload some files from your computer's built-in hard drive by using cloud storage services like Dropbox, Google Drive, and iCloud.
Use a disk cleanup tool to give your machine a regular spring clean. It can remove unnecessary content like temporary internet files and downloaded program files, freeing up space on the hard drive.
4. Does a computer need a graphics card?
The integrated graphics cards in most desktop PCs will be good enough for everyday stuff. But if you’re intending on using your PC for video editing, graphic design, or gaming — you’ll need a graphics card that can handle it.
Going for a desktop with a high-end computer graphics card means you’ll be able to play games in pin-sharp 4K quality on multiple PC monitors. But if you’re thinking about buying a PC and upgrading its graphics card straight away, be sure to check that the power supply can support it before you buy. You’ll need to make sure you've got room on your motherboard for it too.
Not sure how to do this? We’ve got loads of tips on how to upgrade a PC.
5. Should I get an all-in-one desktop computer or a tower computer?
Tower PCs are still popular, but they can be pretty bulky. If you’re limited in terms of space, think about sleek all-in-one PCs instead. Here's how they compare:
Tower PC: More traditional desktop PCs made up of a tower (the case that holds all the components) and a separate desktop monitor. They’re popular with gamers who want an epic rig they can easily customise, or families who want a bit more power for the price.
All-in-one desktop PC: These stylish computers have all their internals built into the monitor, so you don’t have to find room for a separate tower. Everything's together in one machine.
Basically, choose an all-in-one PC if you value simplicity and a lovely, clean desk setup. Or opt for a tower computer if you want power and flexibility most of all. If you do choose the latter, we can help you pick out a perfect monitor to form a productivity-boosting multi-screen setup.
Extra things to consider
We've covered all the big stuff, but there are still a few other details to think about before buying a brand-new desktop PC:
What type of ports and connectivity options do I need?
Have a think about the devices you’ll be hooking up to your computer, whether that's a trusty set of PC speakers or an extra monitor. Common ports to look for include:
USB-C and USB-A: These are for your general peripherals, like external hard drives, USB flash drives, and disc drives. You can use them to charge your phone too!
HDMI or DisplayPort: If you want a more immersive two or three-monitor setup so you can multitask more easily, you'll need these ports to plug in your extra screen(s).
Ethernet: This port is essential if you want a more reliable and stable wired internet connection, especially for online gaming.
Audio jacks: These are so you can plug in wired headphones or separate speakers.
Wi-Fi: All desktop PCs have Wi-Fi so you can wirelessly connect to the internet. But keep an eye out for machines with Wi-Fi 6E or the latest standard (Wi-Fi 7) for the fastest wireless speeds possible.
Bluetooth: This is what you'll need to connect to most wireless mice and wireless keyboards, for a clean desk free of cable clutter.
What’s the best processor?
When it comes to sheer power — it’s all about the processor. This is the brains of your computer, and largely determines how fast it can go and how much work it can do.
Intel Core and AMD Ryzen are the most popular processors around. But remember, while a more powerful processor is better, there's no point overpaying for power you won’t use! Here are some of the most common processors you’ll come across in desktop PCs:
Intel Core i3 / AMD Ryzen 3: Good for carrying out simple everyday tasks like editing Word docs, sending emails, or just web browsing.
Intel Core i5 / AMD Ryzen 5: A more powerful option made for multitasking with a few programs open at the same, live video streaming, and online gaming.
Intel Core i7 / AMD Ryzen 7: A big step up that can handle advanced projects like video editing, complex spreadsheet work, and 3D design rendering.
Intel Core i9 / AMD Ryzen 9: A top-tier choice, designed for professionals who want to use several demanding apps at once without any lag holding them back.
How much power does my desktop PC need?
A desktop’s power supply unit (PSU) determines how much electricity it can safely handle. Most pre-built desktops have this already sorted out, so there's no need to worry about PC power supplies when finding your perfect match.
But if you’re building your own desktop PC, just make sure your PSU matches your components’ power requirements. Adding a bit of extra wattage can future-proof your setup and leave you with some legroom for upgrades too.
What desktop PC dimensions are right for me?
Desktop PCs come in various sizes, ranging from compact mini PCs all the way up to full-size towers. And like with anything new you get for your home, whether it’s a bit of furniture or an appliance, just make sure you measure your space first!
You’ll want to make sure you’ve got enough desk real-estate to accommodate the PC you're planning on getting. And if space is a bit tight, consider smaller PCs or all-in-one models.
What kind of customer support and warranty options are available?
Don’t overlook the support and warranty coverage PC manufacturers offer. Always check the following:
Standard warranty: Usually lasts for one year, but look out for extended options so you’re covered for longer if anything goes wrong.
Support: Some brands offer better tech support than others — so scan through some customer reviews and forums first.
Returns policy: Read the small print and make sure there’s an easy return process if something's not working as it should.
Currys Care & Repair
By adding a Care & Repair plan to your purchase, our experts can keep the tech you’ve bought from us working like magic — including a desktop PC. We’ll offer advice and breakdown support whenever you need it. And with our 7-Day Fix Promise, we’ll repair your tech and get it back to you really fast.
Need any more advice?
For more help choosing the right PC, check out our desktop PC buying guide. Or if you’d like to talk to an expert, pop into your nearest Currys using our store finder or have a video chat instead using ShopLive. Once you’ve made your choice, we’ve got some great tips for getting started with your new laptop or desktop.
