Refurbished Dell OptiPlex desktops have become one of the most popular ways to get a capable Windows 11 PC without spending a fortune. Whether you are a home user who needs a reliable machine for browsing, streaming and light productivity, or a small business owner kitting out a desk on a tight budget, the OptiPlex range offers solid build quality, easy repairability and genuine performance at prices that new budget PCs simply cannot match. Since last year, the refurbished market has matured considerably: more units now ship with larger SSDs, Windows 11 Pro pre-activated, and better quality-control grading from sellers. This roundup covers four Dell OptiPlex models currently available on Amazon UK, all priced well under £700. We have assessed each on CPU generation, RAM, storage, value for money and suitability for different use cases, so you can make a confident choice without trawling through dozens of listings.
Quick Verdict
Best Overall: Dell FAST OptiPlex i7-6700 SFF (B0FG862S6N), the 6th-generation Core i7, 32 GB RAM and 1 TB SSD make it the most capable all-rounder in this group.
Best Value: Dell OptiPlex 7020 SFF i7-4770 16 GB 512 GB (B09XHQ7Y6F), a well-balanced spec at a very competitive price, ideal for everyday home and office tasks.
1. Dell FAST OptiPlex i7-6700 SFF Desktop PC
The Dell FAST OptiPlex i7-6700 SFF is the standout performer in this group and earns the Best Overall title for good reason. It is powered by Intel's 6th-generation Core i7-6700, a quad-core, eight-thread processor running at up to 4.0 GHz, which places it a full two CPU generations ahead of the 4th-generation chips found in the other three models here. That gap matters in practice: the Skylake architecture brings better power efficiency, improved integrated graphics, support for DDR4 memory, and a longer effective lifespan before the processor becomes a genuine bottleneck.
The headline specification that sets this unit apart is its 32 GB of RAM paired with a 1 TB SSD. That combination is genuinely unusual at this price point in the refurbished market. For home users, 32 GB means you can run a browser with dozens of tabs open, a video call, a spreadsheet and a music streaming app simultaneously without any slowdown. For small business users, it is more than enough for accounting software, CRM tools and remote desktop sessions. The 1 TB SSD provides ample space for a large photo library, a music collection, years of documents and still leaves room to spare, removing the need to buy an external drive immediately.
The SFF (Small Form Factor) chassis is compact enough to sit neatly on a desk or be mounted behind a monitor with a VESA bracket, keeping your workspace tidy. The unit ships with Windows 11 Pro pre-activated, which includes BitLocker encryption, Remote Desktop and Group Policy tools, features that matter for anyone working from home on a company network or handling sensitive data.
The integrated GPU is not suitable for gaming beyond very light titles, and the 6th-generation platform does not support PCIe 4.0 or NVMe at the speeds modern systems offer. However, for the vast majority of home and office tasks, neither limitation will ever be felt. If you want the most capable Dell desktop in this catalogue for under £700, this is the one to buy.
Pros
- 6th-generation Core i7-6700 is the newest and fastest CPU in this group
- 32 GB RAM and 1 TB SSD are genuinely generous for the price
- Windows 11 Pro pre-activated with full business feature set
2. Dell OptiPlex 7020 SFF Desktop PC i7-4770 16 GB 512 GB
The Dell OptiPlex 7020 SFF with the Core i7-4770, 16 GB of RAM and a 512 GB SSD is the Best Value pick in this roundup. It sits at a price point that undercuts the i7-6700 model significantly while still delivering a genuinely capable everyday computing experience. The Core i7-4770 is a 4th-generation Haswell processor, a quad-core, eight-thread chip that, despite its age, handles web browsing, office applications, video playback, video conferencing and light photo editing without complaint.
The 16 GB of DDR3 RAM is the sweet spot for home and office use in 2024. It is enough to run Windows 11 Pro comfortably alongside a full suite of productivity applications, and it leaves headroom for multitasking that 8 GB machines simply cannot match. The 512 GB SSD is a practical capacity for most users: you can install your operating system, all your applications and still have room for a substantial personal file collection before needing to think about extra storage.
The OptiPlex 7020 platform is well-regarded in the refurbished market for its reliability and repairability. Parts are widely available, the chassis is straightforward to open, and the BIOS is mature and stable. This makes it a sensible choice for anyone who wants a machine they can maintain themselves or hand to a local repair shop without difficulty.
The unit weighs 6.29 kg, which is typical for an SFF desktop of this era. It ships with Windows 11 Pro pre-activated, giving you access to BitLocker, Remote Desktop and domain-join capabilities. The integrated graphics handle dual-monitor setups and HD video without issue, though 4K content at high frame rates may push the GPU to its limits. For anyone asking which Dell is best for home use on a budget, this model offers the most balanced combination of performance, storage and price in the catalogue.
Pros
- 16 GB RAM and 512 GB SSD provide a well-rounded spec for everyday home and office use
- OptiPlex 7020 platform is highly reliable and easy to repair or upgrade
- Windows 11 Pro included with BitLocker and Remote Desktop support
Cons
- 4th-generation Core i7-4770 is older than the i7-6700 and will reach end of practical life sooner
- Integrated graphics cannot handle dedicated gaming or GPU-accelerated creative work
3. Dell Window 11 Pro OptiPlex Core i5 SFF Desktop Tower PC
The entry-level option in this catalogue is the Dell OptiPlex Core i5 SFF, powered by an Intel Core i5-4570 and configured with 8 GB of DDR3 RAM and a 250 GB SATA SSD. At its price point, this is one of the most affordable ways to get a genuine Dell desktop running Windows 11 Pro, and it makes sense for a specific type of buyer: someone who needs a basic, functional PC for light tasks and has a very tight budget.
The Core i5-4570 is a 4th-generation Haswell quad-core processor without Hyper-Threading, which means it offers four physical cores but no additional virtual threads. For simple tasks such as web browsing, email, word processing, video calls and streaming, it performs adequately. It is not a machine for heavy multitasking or running demanding applications simultaneously, but for a single-purpose workstation, a child's homework PC or a basic reception desk terminal, it does the job.
The 8 GB of RAM is the main constraint at this specification level. Windows 11 Pro itself consumes a meaningful portion of that, leaving less headroom for applications than the 16 GB and 32 GB models in this group. Users who regularly run multiple applications or browser-heavy workflows may find the system feeling sluggish under load. The 250 GB SSD is also on the smaller side, though for a light-use machine focused on documents and web access rather than media storage, it is workable.
The unit ships with Windows 11 Pro pre-activated, which is a genuine advantage over some cheaper refurbished competitors that ship with Home editions or require licence activation steps. The OptiPlex platform's build quality and repairability apply here as across the range. If budget is the primary consideration and the workload is genuinely light, this model represents a functional entry point. However, buyers who can stretch to the OptiPlex 7020 i7 model will notice a significant difference in everyday responsiveness.
Pros
- Lowest price in the group, making it accessible for very tight budgets or secondary-use scenarios
- Windows 11 Pro pre-activated, which is better than many rivals at this price
Cons
- 8 GB RAM is the minimum for Windows 11 and will feel restrictive with multiple applications open
- 250 GB SSD is a small capacity that will fill quickly if used as a primary family or work PC
- Core i5-4570 lacks Hyper-Threading, making it the least capable processor in this group
Buying Guide
Why Choose a Refurbished Dell OptiPlex?
The OptiPlex range was designed for commercial and enterprise use, which means these machines are built to a higher standard than most consumer-grade PCs at equivalent price points. They use quality components, offer tool-free access to internals, and are designed to run continuously in demanding environments. When bought refurbished, they offer exceptional value because the original depreciation has already occurred, yet the hardware remains capable for everyday tasks. Dell's commercial platform also means spare parts, RAM upgrades and replacement drives are widely available and inexpensive.
Processor Generation: Why It Matters
All three units in this catalogue use Intel Core i7 or i5 processors from the 4th or 6th generation. The 6th-generation Core i7-6700 (Skylake) is meaningfully faster and more efficient than the 4th-generation Core i7-4770 (Haswell), and it supports DDR4 memory, which has better long-term platform support. The 4th-generation chips are still capable for everyday tasks but are older, and Windows 11 support for very old hardware can occasionally present compatibility considerations. If longevity is a priority, the 6th-generation model is the wiser investment.
RAM: How Much Do You Need?
For basic home use, browsing, email and streaming, 8 GB is the absolute minimum with Windows 11. For comfortable multitasking, video calls and office applications, 16 GB is the recommended starting point. If you run multiple applications simultaneously, work with large spreadsheets or use virtual machines, 32 GB provides genuine headroom. Upgrading RAM in OptiPlex machines is straightforward and inexpensive, so buying a lower-RAM model and upgrading later is a viable strategy if budget is tight initially.
Storage: SSD Versus HDD
All three units in this catalogue ship with SSD storage, which is the correct choice for a Windows 11 machine. SSDs boot faster, open applications more quickly and are more reliable than spinning hard drives. Capacity matters too: 250 GB is workable for light use but will fill quickly on a primary PC. 512 GB is a practical minimum for most households. 1 TB gives comfortable headroom for photos, music, documents and applications without requiring immediate external storage.
Are Dell Desktops Better Than HP?
Both Dell and HP produce excellent commercial desktop ranges, and the honest answer is that neither is universally better. Dell's OptiPlex and HP's EliteDesk are both well-regarded in the refurbished market for build quality, repairability and parts availability. Dell tends to score slightly higher on chassis design and BIOS maturity in user surveys, while HP's EliteDesk machines are equally reliable. For UK buyers, the choice often comes down to which specific model offers the best specification at the best price at the time of purchase, rather than brand loyalty.
What to Look For in a Refurbished Desktop
Always check the seller's grading system: Grade A typically means minimal cosmetic wear, Grade B means visible marks but full functionality. Confirm that Windows 11 Pro is pre-activated rather than requiring a separate licence purchase. Check the warranty period: reputable sellers offer at least 12 months. Verify whether the listing includes a power cable and, if relevant to your setup, whether a monitor, keyboard and mouse are included or need to be purchased separately. Finally, check the returns policy in case the unit arrives with an undisclosed fault.
