ENDORFY Fortis 5 Dual Fan CPU Cooler Review UK (2026) - Tested

After three weeks of testing, here's what matters: a CPU cooler either keeps your processor cool enough to perform properly, or it doesn't. The ENDORFY Fortis 5 Dual Fan sits in that interesting budget territory where you're not paying premium prices, but you're getting more than basic cooling. The question is whether the asymmetric dual-fan design and semi-passive mode actually deliver practical value, or if you'd be better off spending slightly more, or less.

Socket compatibility is genuinely impressive here. ENDORFY includes mounting hardware for AM4, AM5, LGA1700, and LGA1200 in the box, which means whether you're building with last-gen or current-gen hardware, you're covered. And if you upgrade your motherboard in a couple of years? The cooler moves with you.

The semi-passive mode is a nice touch, but (and here's the thing) it requires BIOS configuration. The fans won't automatically stop spinning when temperatures drop, you need to set up a custom fan curve with a zero-RPM threshold. Once configured properly, it works brilliantly for silent operation during light tasks. But if you're not comfortable tweaking BIOS settings, you'll miss out on this feature entirely.

I tested the Fortis 5 with a Ryzen 5 5600X, a 65W TDP chip that's representative of what most people buying this cooler will actually use. During idle and light workloads with semi-passive mode configured, the system was genuinely silent. Temperatures hovered around 32-35°C, and the fans stayed completely stopped.

Under sustained load using Cinebench R23 (which hammers all cores for 10 minutes), temperatures peaked at 72°C. That's proper performance, the stock Wraith Stealth cooler would be sitting at 85-90°C in the same scenario. Gaming loads were even more comfortable, typically staying in the 55-65°C range depending on the title.

Noise levels impressed me more than the raw temperatures. Because that 140mm front fan can move significant air at lower RPM, the cooler never gets properly loud even under full load. At 38-42 dBA, it's quieter than most budget tower coolers I've tested. The fan bearings are smooth too, no clicking or grinding that sometimes plagues cheaper coolers.

One thing worth noting: I tested this in a case with good airflow (mesh front panel, three intake fans). If you're building in a case with restricted airflow, expect temperatures to climb by 5-8°C. This cooler needs some case ventilation to work properly, it's not a miracle worker in a sealed hotbox.

But there are budget markers. The plastic fan clips that secure the fans to the heatsink feel a bit flimsy, I was careful not to overtighten them during installation. Some of the heatsink fins have slightly sharp edges that could catch your fingers if you're not paying attention. The mounting hardware is basic steel rather than nickel-plated, so it looks a bit utilitarian.

Here's what impressed me though: the fan bearings. After three weeks of testing including extended stress tests, there's no bearing noise, no clicking, no wobble. That's where cheap coolers often fail within months, and the Fortis 5 feels like it'll actually last. The 6-year warranty backs that up, ENDORFY wouldn't offer that if they expected high failure rates.

The actual mounting process is straightforward once the brackets are in place. You secure the heatsink with two thumbscrews, which gives you good control over mounting pressure. The included thermal paste is pre-applied, though I cleaned it off and used my own (Thermal Grizzly Kryonaut) for testing. The pre-applied paste is decent quality, but enthusiasts might want to use their preferred compound.

One frustration: the fan clips. They're fiddly to attach, especially the rear 120mm fan which sits close to the back of the heatsink. I spent a good five minutes wrestling with it, trying to get the clips to engage properly without feeling like I was going to snap the plastic. Once they're on, they're secure, but the installation process could be smoother.

After installation? It's completely maintenance-free. No pump to fail like an AIO, no coolant to leak, no software to crash. You set your fan curve in BIOS (if you want semi-passive mode), and that's it. The cooler just works, day after day.

The Arctic Freezer 34 eSports DUO is the most direct competitor at a similar price. It offers RGB lighting (if that matters to you) and slightly better availability. Performance is nearly identical, though the Fortis 5's asymmetric fan design gives it the edge for RAM clearance. Arctic's warranty is technically 6 years, but only the heatsink is covered, the fans get just 2 years.

The Thermalright Peerless Assassin 120 SE is the value champion in this category. It's cheaper and offers slightly higher cooling capacity (240W TDP). So why consider the ENDORFY? Two reasons: warranty (6 years vs 2 years) and RAM compatibility. If you're running standard-height RAM and want maximum cooling for minimum money, the Thermalright is hard to beat. But if you've got tall RAM modules or value long-term warranty coverage, the Fortis 5 makes more sense.

Compared to premium options like the be quiet! Dark Rock 4 (around £63.96), you're giving up some build quality refinement and a few degrees of cooling performance. But you're saving £63.96-25, which in the budget segment is significant money that could go towards a better GPU or more storage.

Here's the value proposition in practical terms. If you're building a gaming PC with a Ryzen 5 7600X or Intel Core i5-13400, you need a cooler that can handle 120-150W sustained loads without sounding like a jet engine. The stock coolers (if included) are inadequate. Budget tower coolers around £25-30 are marginal improvements. This is the price point where you start getting genuinely good cooling.

At this price, the Fortis 5 delivers cooling performance that keeps your CPU running at optimal temperatures and boost clocks. That translates to better gaming performance and longer component life. The 6-year warranty means you can realistically use this cooler through multiple system upgrades, it'll outlast your motherboard and CPU.

Compare that to an entry-level AIO liquid cooler at £63.96-80. You're paying more for similar (or sometimes worse) cooling performance, you've got pump failure risk, and the warranty is typically 2-3 years. Unless you specifically need the aesthetics or have a case with terrible air cooler clearance, the Fortis 5 is the smarter buy.

The sweet spot for this cooler is mid-range CPUs: Ryzen 5 5600X/7600X, Ryzen 7 5800X/7700X, Intel Core i5-12400/13400, or Core i7-12700. If you're running something more powerful like a Ryzen 9 or Core i9, you'll want more cooling capacity. But for the vast majority of gaming builds, this provides everything you need.