Dell Optiplex Desktop Review UK (2026), i5-4570 Tested

Look, I've built probably four hundred PCs over the past twelve years. Custom loops, bespoke cable management, the whole lot. And I'll be honest with you: there's a very real moment when someone asks me to help them find a basic desktop for light work where I think, why are we overcomplicating this? Not every use case needs a hand-picked build. Sometimes you just need a machine that boots Windows, runs a browser, handles a spreadsheet, and doesn't fall apart after six months. That's the conversation we're having today with this Dell Optiplex.

The Dell Optiplex Desktop Review UK (2026), i5-4570 Tested is a refurbished small form factor office machine running a fourth-generation Intel Core i5. Yes, fourth gen. That's Haswell architecture, which launched back in 2013. So before we go any further, let's be completely clear about what this is: it's a budget-tier, refurbished business desktop aimed squarely at people who need a functional Windows PC for under a hundred quid. Students, home office users, elderly relatives who just need email and YouTube, small charities on tight budgets. That's the audience. If you're reading this hoping for a gaming rig or a video editing workstation, close the tab now and save yourself the scroll.

I ran this machine for several weeks across a range of everyday tasks. Word processing, web browsing with a dozen tabs open, streaming video, light spreadsheet work, the occasional PDF. I also pushed it a bit harder than its intended audience probably would, just to see where the walls are. Here's what I found.

The PSU in these small form factor units is a Dell proprietary 255W unit. That's not a lot of headroom, and it's worth flagging early because it directly affects upgrade potential (more on that later). The operating system is Windows 10 Pro or Windows 11 Pro depending on the refurbisher, which is actually a genuine selling point at this price tier. Getting a Pro licence bundled in saves you money versus buying it separately. The machine ships without a monitor, keyboard, or mouse, so factor that into your total budget if you're starting from scratch.

One thing I'll say for Dell's Optiplex line generally: the build quality on these business machines is noticeably better than consumer-grade prebuilts at similar price points. The chassis is steel, the internals are tidy, and the components are sourced from proper enterprise supply chains rather than the cheapest possible OEM parts. That matters when you're buying refurbished, because it means the original hardware was built to last a business lifecycle, not just a consumer warranty period.

Where it starts to show its age is anything more demanding. Compiling code, running virtual machines, working with large Excel files with complex macros, video calls with screen sharing running simultaneously. These tasks don't break the machine, but you'll notice the processor working harder than a modern chip would. In Cinebench R20 (single core), expect scores around 280-300. That puts it well behind a modern Intel N100 or AMD Ryzen 3 5300G, both of which you'd find in newer budget machines. Multi-core scores are similarly modest given the four cores and lack of hyperthreading on this particular i5 variant.

For the target audience though, none of that really matters. A student writing essays and submitting work through a university portal doesn't need Cinebench scores. A home user doing online banking and watching iPlayer doesn't care about multi-threaded performance. The i5-4570 is quick enough that it doesn't feel sluggish in day-to-day use, and that's the honest benchmark that matters here. Paired with the SSD (which is the single biggest upgrade these refurbished Optiplexes got over their original spinning-disk configurations), the machine boots in under fifteen seconds and applications open without the painful wait you'd get from an old HDD-based system.

What can it actually do? Older titles and less demanding games are possible. Minecraft at low settings will run. Older indie games, 2D titles, browser-based games, these all work fine. Emulation of older consoles up to PS2 era is generally manageable. But anything with modern 3D rendering, forget it. We tested a few older titles during our testing period: CS:GO (now CS2) was unplayable, Fortnite was a slideshow, but something like Stardew Valley ran perfectly and older titles like Team Fortress 2 managed around 30fps at 720p low settings. That's the ceiling.

The SFF chassis does have a low-profile PCIe x16 slot, which means you could theoretically add a low-profile discrete GPU later. Something like a used GTX 1650 LP or an RX 6400 LP would transform the gaming capability of this machine significantly. But you're then spending additional money on top of the purchase price, and the 255W proprietary PSU limits your options. If gaming is even a secondary concern for you, factor that upgrade cost in from the start, or look at a different machine entirely. This Optiplex, as it ships, is not a gaming PC.

The SSD is the real hero of these refurbished Optiplex builds. When these machines left Dell's factories originally, many shipped with mechanical hard drives. The refurbishers who sell them on Amazon have typically swapped those out for SATA SSDs, and that single change makes an enormous difference to the user experience. Boot times, application loading, file transfers: everything feels snappy in a way that an old HDD-based system simply wouldn't. The SATA SSD won't win any speed awards against a modern NVMe drive, but for everyday tasks the difference is barely noticeable in real use.

Storage capacity at 256GB is tight if you're planning to install a lot of software or store media locally. For a basic productivity machine where most things live in the cloud or on external drives, it's workable. The good news is that the Optiplex 3020 SFF (which is the most common chassis for this spec) has a 2.5-inch SATA bay and a 3.5-inch bay, so adding a second drive is straightforward. You can pick up a 1TB SATA SSD for well under thirty quid these days, and it's a simple five-minute job to fit one. RAM is also upgradeable: the board has four DDR3 DIMM slots, so going to 16GB is cheap and easy if you find 8GB limiting.

Under sustained load, the fan does spin up noticeably. Running a CPU stress test for fifteen minutes pushed temperatures to around 75-80 degrees Celsius on the i5-4570, which is within spec but not exactly cool. The system didn't throttle during our testing, which is the important thing. It maintained its rated clock speeds throughout. But the thermal headroom is limited by the SFF design, and if you're in a warm room or the vents get dusty (which they will over time), you'll want to keep an eye on temperatures.

Dust is actually a real consideration with these refurbished machines. They've been in office environments for years, and even if the refurbisher has cleaned them out (good ones do), the heatsink fins and fan can accumulate dust quickly. A can of compressed air every few months is genuinely worth doing. The SFF case is easy enough to open: one thumb screw on the side panel and it slides off. Keeping the airflow path clear will make a meaningful difference to long-term thermals and noise levels. It's a five-minute job and worth doing from day one.

The internal layout is tidy. Cable management in an SFF chassis is always going to be limited by space, but Dell's engineers have done a decent job routing cables sensibly. The drive bays are accessible, the RAM slots are easy to reach, and the CPU cooler can be removed without too much drama if you ever need to repaste. The tool-free design for most internal components is a nice touch that makes upgrades and maintenance more approachable for less experienced users.

There's no RGB here. None. Zero. This is a plain black business box and it looks exactly like that. If you want a machine that lights up your desk like a Christmas tree, this isn't it. But honestly, for a home office or a student desk, the understated look is fine. It's small enough to sit on a desk without dominating the space, or it can go on the floor or a shelf without looking out of place. The compact footprint is a genuine practical advantage over full-tower consumer builds, especially in smaller living spaces.

The DisplayPort output is worth highlighting because it supports modern monitors properly, including higher refresh rates and resolutions up to 4K (though the integrated graphics won't be rendering anything at 4K, the signal output is there). VGA is there for legacy monitors, which is actually useful if you're pairing this with an older display. No HDMI on the rear of the base unit, which is a minor annoyance if your monitor only has HDMI, but a cheap DisplayPort to HDMI adapter sorts that in seconds.

There's no built-in WiFi on the standard Optiplex 3020 SFF. It relies on wired Ethernet, which is actually fine for a desktop that's going to sit on a desk near a router. Wired is more reliable and faster anyway. But if you need wireless, you'll want to add a USB WiFi adapter or a PCIe WiFi card. There's a half-height PCIe slot available for exactly this purpose. Bluetooth is similarly absent by default. Again, a cheap USB Bluetooth dongle solves this if you need it. These aren't dealbreakers, but they're worth knowing about before you buy.

Bloatware is minimal compared to consumer prebuilts. Dell's business machines don't come loaded with trial software, antivirus subscriptions, and promotional apps the way consumer-focused brands sometimes do. You get Windows, the basic Dell support utilities, and that's largely it. The refurbisher may have done a clean install, in which case it's even cleaner. Either way, you're not spending your first hour uninstalling junk you never asked for.

Windows 11 compatibility is worth addressing because it comes up a lot with older hardware. The i5-4570 doesn't officially meet Microsoft's TPM 2.0 requirement for Windows 11. Some refurbishers install it anyway using workarounds, others stick with Windows 10 Pro. Windows 10 reaches end of support in October 2025, so if you're buying this in 2026, you'll want to check what OS is installed and whether the seller has addressed the Windows 11 situation. It's not insurmountable, but it's a genuine consideration for long-term use.

The GPU situation is trickier. There is a low-profile PCIe x16 slot, and low-profile cards like the GTX 1650 LP or RX 6400 LP will physically fit and work. But the 255W proprietary PSU is the limiting factor. The RX 6400 is actually a good match because it draws power entirely from the PCIe slot with no additional connector needed, keeping total system draw within the PSU's limits. A GTX 1650 LP is similarly manageable. Go beyond that and you're risking PSU stability. The proprietary PSU also means you can't simply swap it for a higher-wattage standard ATX unit without a chassis change.

The CPU is locked to the LGA1150 platform, so your upgrade options there are limited to other Haswell or Devil's Canyon chips. An i7-4790 would be a meaningful step up and can be found cheaply second-hand. But honestly, at the point where you're spending money on a GPU, a CPU upgrade, and extra RAM, you're approaching the cost of a more capable modern machine. The upgrade path is there, but think carefully about whether it makes more sense to invest in this platform or save toward something newer. For most buyers at this price tier, the machine as-is is the right call.

The HP EliteDesk G1 is essentially a direct competitor: same generation hardware, same SFF form factor, similar refurbished pricing. The choice between them often comes down to which specific configuration you can find at the time of purchase. Dell's Optiplex has a slight edge in terms of parts availability and community support because it's been such a popular platform for refurbishers. The Acer Aspire TC at a higher price brings newer architecture and better long-term Windows 11 support, but costs meaningfully more. For buyers on the tightest budgets, that price difference matters.

What the Optiplex does better than most consumer prebuilts at any price is build quality and reliability. These machines were built for business environments where downtime costs money. That heritage shows in the construction quality, and it's a real advantage when buying refurbished because you're starting with hardware that was designed to last.

The Dell Optiplex Desktop Review UK (2026), i5-4570 Tested earns its place in the budget tier not by being impressive, but by being honest. It's a well-built, reliable, properly licensed Windows machine that handles everyday tasks without fuss. The SSD makes it feel snappier than you'd expect from hardware this age. The business-grade chassis means it's more durable than consumer alternatives at similar prices. And the Windows Pro licence is a genuine bonus that adds real value.

Skip it if you need gaming performance, video editing capability, or a machine that's fully Windows 11 ready without workarounds. Skip it if you're planning heavy multitasking or running demanding software. Skip it if you want upgrade flexibility, because the proprietary PSU and ageing platform limit your options. For those use cases, spend more and get something with a modern platform. But if your needs are genuinely basic and your budget is genuinely tight, this is a sensible, honest choice. I'd give it a 7 out of 10 within its budget tier, and I mean that as a genuine recommendation for the right buyer, not a consolation score.