Fractal Design North Momentum and AMD Ryzen 9850X3D: A Cleaner, Quieter Build Refresh

Introduction

After spending months with small form factor builds, the appeal of a cleaner, more reserved setup became hard to ignore. The goal for this refresh was simple: reclaim some desk space, ditch the lighting control software, and build something that looks as good as it performs. Two new pieces of hardware made this the right moment for an upgrade: the Fractal Design North Momentum Edition case and the AMD Ryzen 9850X3D processor.

The North Momentum is a new take on the popular North case, with an almost totally blacked-out aesthetic. The Ryzen 9850X3D is AMD’s latest flagship gaming CPU, promising a modest boost over its predecessor. Together, they form the foundation of a build that prioritizes cleanliness and quiet operation without sacrificing performance.

Fractal Design North Momentum: First Impressions

The Fractal Design North Momentum Edition retails at $179.99 US, a noticeable step up from the original North’s $129.99 US launch price. The moment you open the box, the design direction is clear: this is a case that wants to disappear into a dark, minimalist setup. The front panel features black and oak wood, still real wood, and all the brass accents from the original are now finished in a titanium-like color the company calls alloy.

A tinted tempered glass side panel completes the look, and three of Fractal’s Momentum 120mm PWM fans come pre-installed in the front. These fans are daisy-chained for a cleaner install, and they feel solid at first glance. One notable omission remains: there is no included fan hub. For builds using a 240mm AIO in the roof, this is not a big deal, but for those running fans up top, a hub makes cable management significantly easier.

The case is designed to accommodate large graphics cards, but just barely. With the ASUS Astro RTX 5090 installed, there are only two to three millimeters of clearance after clearing the GPU mounting bracket. This is a tight fit, but it works. The standard size North will not fit a 360mm AIO with a radiator in the front, so a 240mm AIO in the roof or a quality air cooler is the way to go.

AMD Ryzen 9850X3D: Performance Expectations

The AMD Ryzen 9850X3D shares most of its core specifications with the Ryzen 9800X3D. Both are 8-core, 16-thread processors with 104MB of combined L2 and L3 cache, a 120-watt TDP, integrated graphics, and a 4.7 GHz base clock. The primary difference is the boost clock: the 9850X3D reaches 5.6 GHz compared to the 9800X3D’s 5.2 GHz.

Given these similarities, expectations for a large performance jump were reserved. Most outlets report around a 20% increase in power draw for the 9850X3D, which is a significant consideration for cooling and noise. In gaming benchmarks, the results are a mixed bag. At 1080p, the 9850X3D averages a 2.27% increase over the 9800X3D. At 1440p, the average increase is around 3%. Across a broader set of reviews, the accepted average seems to be between 3% and 5%.

At 4K resolution, there is essentially no change in performance, with the exception of one title showing a large leap. The more revealing takeaway is that the older Ryzen 7800X3D remains entirely viable for 4K gaming when paired with a high-end GPU like the RTX 5090. Productivity workflows do show some improvement, particularly in synthetic benchmarks that stress the CPU alone or emulate a real-world CPU and GPU combination.

Building in the North Momentum

The North has always been a straightforward case to build in, and the Momentum Edition continues that tradition. Cable management is easy, with plenty of Velcro straps and routing points. The included fans perform well, with temperatures under load nearly identical to those from high-end aftermarket fans like the Noctua NF-A12x25. The sound profile is also comparable, making the included fans a legitimate choice rather than something to immediately replace.

For this build, a be quiet! Dark Rock Pro 5 air cooler was used for the CPU, along with some Silent Wings Pro 4 fans repurposed from a previous build. With manual fan curves set in the UEFI, the system is essentially silent at idle. During CPU and memory torture testing, the fans do not ramp up aggressively, and the CPU stays around 70 degrees Celsius or under.

Under a demanding 4K gaming load, the system does get louder. The included fans, with their 2,000 RPM maximum, are the loudest of the bunch. With the be quiet! fans capped at 1,000 RPM in silent mode, the total system temperature stays between 50 and 60 degrees Celsius, but the noise level rises to just over 50 dB from an ambient 40 dB. Swapping the front fans for quieter alternatives yields only a marginal improvement of 1 to 1.5 dB.

The All-Black Aesthetic and Software-Free Approach

The mission for this build was a cleaner gaming setup with zero control software. That means no Armory Crate, no lighting control software, and nothing for peripherals. The RGB strip on the Astro graphics card looks nice, but turning it off completely is a challenge. Even the lighting options in the UEFI have no effect on it. The most effective method is to install OpenRGB, turn the light off, and then uninstall the software.

The North Momentum’s all-black aesthetic is its main selling point. It is currently the only place to get this fully blacked-out look, which gives it some tough competition from cases like the Antec Flux. The Flux is a little larger and arguably better executed, but it does not offer the same visual style.

Final Thoughts on the Build

The Fractal Design North Momentum is mostly a recolor of the original North, but the included fans are solid enough that you would actually use them. The pricing puts it in a competitive spot, and the all-black aesthetic is unique. For those coming from a previous North Mesh version, the mesh side panel fits perfectly in both fit and color matching.

The AMD Ryzen 9850X3D is technically the fastest gaming CPU on the market, but the performance gains over the 9800X3D are modest. At a retail price of $499.99, it is only $20 more than the 9800X3D’s MSRP, which can now be found as low as $449.99. The older 7800X3D, available for around $369.99, still offers solid 4K gaming performance. The AM5 socket’s longevity means the 9800X3D or 9850X3D are drop-in upgrades even on older motherboards.

Conclusion

The refresh was a success. The system is louder than ideal under load, but the look and footprint on the desk are a significant improvement. For those who want to take it further, mounting the entire PC under a sit-stand desk helps with noise isolation and frees up even more desk space. The Fractal Design North Momentum and AMD Ryzen 9850X3D both deliver on their promises, making this a worthwhile upgrade for anyone looking to build a cleaner, more refined gaming setup.