Walk into almost any South African office, school or call centre and you’ll probably find a Dell OptiPlex under a desk. Dell’s business desktop range is built for years of daily work, which is exactly why so many good machines come back onto the market when companies upgrade. Bought refurbished, an OptiPlex gives you business-class reliability for far less than a new PC.
The catch is that “OptiPlex” covers more than a decade of models, from 4th gen Intel Core machines to current 14th gen models. This guide explains how the range is named, the different sizes, which generations are worth buying in 2026 and how to choose the right refurbished OptiPlex for your home or business.
What is a Dell OptiPlex?
OptiPlex is Dell’s line of desktop computers for businesses, schools and government. Compared with consumer desktops, they’re designed for easy servicing, long-term reliability and IT management, with plenty of USB ports and display outputs and no unnecessary extras. That makes them ideal second-life machines: they’re simple to refurbish, easy to upgrade and parts are widely available.
For most people, a refurbished OptiPlex handles email, Microsoft Office, accounting software, browsing, video calls and point-of-sale work comfortably. If you’re furnishing an office, our article on the benefits of refurbished desktops for your office covers the bigger picture.
How Dell OptiPlex model numbers work
OptiPlex model numbers can look random, but there’s a pattern. Broadly, the first digit shows the tier and the following digits show the generation of that tier:
- 3000 series (for example, the 3040 or 3060): the entry-level business tier.
- 5000 series (for example, the 5040): the mid-range tier.
- 7000 series (for example, the 7040, 7060, 7070 and 7090): the most popular tier for businesses, with more ports and better build and management features.
- 9000 series (for example, the 9020 and the 9030 All-in-One): the premium tier in older ranges.
Within a tier, a higher number usually means a newer model. A 7060 is newer than a 7040, and a 7090 is newer than a 7070. One exception catches buyers out: Dell has reused some model numbers. The original OptiPlex 7020 uses a 4th gen Intel Core processor, while the current OptiPlex 7020 is a much newer machine (the one on our site has a 14th gen Core i5). Always check the processor generation, not just the model number.
Dell OptiPlex sizes: Micro, small form factor, tower and all-in-one
Many OptiPlex models come in several case sizes. Each has its strengths:
- Micro: a tiny box that can mount behind a monitor or sit on a desk. Ideal for reception desks, point of sale and tight spaces. Our Dell OptiPlex 7060 Micro is a good example.
- Small form factor (SFF): slim enough to sit under a monitor, with room for a full-size drive and some upgrades.
- Tower: the largest case, with the most room for extra drives and expansion cards.
- All-in-One: the computer is built into the screen, so there’s only one cable to the wall. The Dell OptiPlex 9030 All-in-One has a 23″ screen built in.
Which Dell OptiPlex generation should you buy?
The processor generation affects speed, power use and, most importantly in 2026, which version of Windows the computer can officially run. Microsoft ended support for Windows 10 on 14 October 2025. Windows 10 PCs still work, but they no longer get security updates unless they’re enrolled in Microsoft’s Extended Security Updates programme. Microsoft’s list of Windows 11 supported Intel processors starts at the 8th generation of Intel Core.
| OptiPlex models we stock | Intel Core generation | Windows 11 processor support | Best for |
|---|---|---|---|
| OptiPlex 7020 (original), 9020, 9030 All-in-One | 4th gen | Not on Microsoft’s supported list | Basic tasks on a tight budget |
| OptiPlex 7040 | 6th gen | Not on Microsoft’s supported list | Everyday office work |
| OptiPlex 7060 and 7060 Micro | 8th gen | On Microsoft’s supported list | Best value for most buyers |
| OptiPlex 7070 | 9th gen | On Microsoft’s supported list | Office work with a longer life |
| OptiPlex 7090 | 10th gen | On Microsoft’s supported list | Heavier multitasking |
| OptiPlex 7020 (current model) | 14th gen | On Microsoft’s supported list | The newest and longest-lasting option |
Our view: for most homes and offices, an 8th gen OptiPlex such as the 7060 is the sweet spot between price and future-proofing. Choose a 10th or 14th gen model if you want the machine to last as long as possible. 4th and 6th gen models still do a good job for basic tasks, but think about the Windows 10 situation before you buy one.
Dell OptiPlex models available at Refurbs4U
Stock changes often, but these are some of the refurbished OptiPlex desktops on our product pages:
- Dell OptiPlex 7090: Intel Core i5 10th gen, 16GB memory, 256GB SSD and Windows 11 Pro.
- Dell OptiPlex 7070: Intel Core i5 9th gen, 8GB memory and 256GB SSD.
- Dell OptiPlex 7060 i7: Intel Core i7 8th gen, 16GB memory, 256GB SSD plus a 500GB hard drive.
- Dell OptiPlex 7060 bundle: Intel Core i7 8th gen with a 22″ monitor, keyboard and mouse.
- Dell OptiPlex 7020 (14th gen): Intel Core i5 14th gen, 16GB memory, 512GB SSD and Windows 11 Pro.
- Dell OptiPlex 9020: Intel Core i7 4th gen, 16GB memory and 256GB SSD.
Want to read more about specific models first? See our reviews of the Dell OptiPlex 7060, the OptiPlex 7060 bundle and the OptiPlex 7020.
What to check before you buy a refurbished OptiPlex
- Processor generation: 8th gen or newer if you want a processor on Microsoft’s Windows 11 list.
- Memory: 8GB is fine for light use. Choose 16GB for heavy multitasking, large spreadsheets or many browser tabs.
- Storage: insist on an SSD for the operating system. It makes a big difference to start-up and everyday speed. A second hard drive is handy for extra storage.
- Ports and displays: count the monitors you’ll connect and check the DisplayPort, HDMI or VGA outputs match your screens.
- Case size: Micro for small spaces, a larger case if you want to add drives or cards later.
- Bundle or not: if you need a complete setup, a desktop bundle with monitor, keyboard and mouse saves time. Otherwise, add a screen from our monitors range.
- Warranty: our OptiPlex product pages include a 12-month warranty (T&Cs apply), upgradable to 24 months.
Dell OptiPlex or another brand?
The OptiPlex isn’t the only good refurbished business desktop. Lenovo’s ThinkCentre range is built for the same kind of work. Read our Lenovo ThinkCentre M710s review if you’d like to compare. In practice, the generation, memory and storage matter more than the badge, so compare like with like.
Frequently asked questions
Is a Dell OptiPlex good for home use?
Yes. A Dell OptiPlex handles browsing, email, Microsoft Office, schoolwork, streaming and video calls comfortably. It isn’t designed for modern gaming, but it’s a reliable everyday computer.
Which Dell OptiPlex is best value?
For most buyers, an 8th gen model such as the OptiPlex 7060 offers the best balance of price and performance, and its processor is on Microsoft’s Windows 11 supported list. Newer 10th and 14th gen models last longer but cost more.
Can a Dell OptiPlex run Windows 11?
Models with an 8th gen or newer Intel Core processor, such as the 7060, 7070, 7090 and current 7020, have processors on Microsoft’s Windows 11 supported list. Older 4th and 6th gen models such as the 9020 and 7040 don’t.
What is the difference between OptiPlex 3000, 5000 and 7000 series?
They’re Dell’s business tiers. The 3000 series is entry-level, the 5000 series is mid-range and the 7000 series is the higher business tier with more ports and management features.
Do refurbished Dell OptiPlex desktops from Refurbs4U have a warranty?
Yes. Our OptiPlex product pages include a 12-month warranty, terms and conditions apply, and the warranty can be upgraded to 24 months.
Find your refurbished Dell OptiPlex
Browse our refurbished desktops, including Core i5 desktops and Core i7 desktops, or contact Refurbs4U and tell us what you’ll use the computer for. We’ll help you choose the right OptiPlex for the job.