I never had the opportunity to review Antec’s original Flux Pro PC case, and its high-airflow design may have passed me by had the company not collaborated with air-cooling kingpin Noctua. My PCMag colleagues certainly couldn’t ignore all that unmistakable Noctua brown and beige when they first saw this case at Computex 2025, but it was nearly Computex 2026 time before I could get our hands on the airflow-optimized, pricey final product. Noctua’s chassis fans and CPU coolers have a legendary following, of course, but the $399 price for the Antec Flux Pro Noctua Edition chassis I received left me wondering if this collab could possibly produce the performance to justify that price.

Spoiler: If you like Noctua gear enough, yes. This case is an epic effort that’ll thrill the Noctua fanbase, and it ran my ATX test configuration with efficiency and ease. The value proposition comes down to how much you care about maximum air cooling performance, the distinctive Noctua color scheme (you’ll love it or hate it), and your affinity for luxe touches like wood highlights. “Noctua beige” is the anchovy of the PC component world: You don’t have a lukewarm opinion of it. Plenty of enthusiasts are big fans of Noctua fans, but, to be sure: Other opinions are available.

Design: Wood I Ever!

Under soft lighting, the Flux Pro Noctua Edition can appear almost black, so the wood frame surrounding its 3D mesh face panel insert might be the first thing you’d notice upon opening the box and setting up the case on your table. The Noctua brown accents pop in better light, and some of the Noctua branding stands out more than other bits. There’s also a small digital display on the side, but until the PC is built and it’s lit, you’re more likely to notice the perforated vent pattern that fills its brown surrounding panel.

Antec obviously felt that its original Flux Pro would sit next to your left leg, as it placed its headset combo jack, USB 3.2 Type-A and Gen 2x2 Type-C ports all where they’d be convenient for such placement. (I do wonder, though, how many potential shoppers will put a $400 case like this one on the floor, with the windowed side facing away from them. Hmmm.) As dust has always been a problem for top-panel-mounted ports, Antec throws in a set of dust plugs for the ports that you’ll probably lose as soon as you begin using those connectors.

Power, reset, and temperature-display buttons are also found up here. Some Noctua-specific branding alongside the ports complements the lid’s special color.

(Credit: Thomas Soderstrom)

The front also features a slide-out filter, which serves the bottom of the chassis. This filter screens the case’s two lower 140mm/120mm fan mounts and the power supply’s air inlet.

(Credit: Thomas Soderstrom)

The rear panel features eight PCI Express expansion slot positions, a power-supply mount with a fancy ventilated cover (more about that later), and a dual-format 140mm/120mm mount for an exhaust fan. The fan mount uses slots rather than holes to allow you to adjust the vertical placement of your exhaust fan between the graphics card and the top-panel cooling solution you choose.

The right side’s black panel has a vented portion that services the area under the power supply’s internal shroud. The shroud visually separates the power-supply chamber from the motherboard chamber when viewed from the other side.

(Credit: Thomas Soderstrom)

Removing the Flux Pro Noctua Edition’s front panel exposes a 40mm-deep removable front fan mount that’s big enough to hold three 140mm fans. (It supports 120mm spinners as well.) There’s enough room behind the mount to fit a radiator up to 500mm (!) long, and the gap in the power supply shroud to let the radiator pass through is even large enough to permit a gigantic 60mm-thick 420mm-format radiator behind a set of similarly gargantuan 140mm-by-38mm fans. I challenge you to find a radiator-and-fan combo too long or thick for this space.

(Credit: Thomas Soderstrom)

Assuming you don’t use all of that space for a front radiator, the top panel also fits a radiator up to the same size. The mount sits around 70mm above the motherboard’s front edge, and those whose 420mm-format radiator and triple-140mm-fan combinations exceed that measure will find around 44mm of horizontal clearance between their cooler’s inner edge and the motherboard’s surface. (Fair warning if you plan to pair an extra-thick cooling combo with extra-tall DIMMs.)

(Credit: Thomas Soderstrom)

Notice that the top of the power-supply shroud (the brown frame) is designed to hold either three fans or three space-filling covers, but that two of the covers aren’t mounted? It’s part of a feature that I’ll explain in a moment.

(Credit: Thomas Soderstrom)

Also notice the power-supply mount on the right rear section of the power supply bay. The Flux Pro chassis is designed to hold a power supply in the usual orientation (exiting the case’s rear panel) or rotated 90 degrees internally. This feature explains why my picture of the rear of the case shows a filler panel installed with a power connector. (The connector is part of an internal extension cable that you plug into your PSU if you decide to install it rotated.)

The term “Extended ATX” includes any ATX-based motherboard layout that’s more than 9.6 inches deep, and up to 13 inches deep. Antec placed an inward step near the front of the motherboard tray exactly 13 inches from the I/O panel. Having noticed this, I had to fight myself on what form factor to label this case with. Why? The case does not support the extra three standoffs intended to keep boards that large from making contact with the tray. Spacers have always been an option for motherboard overhang, but intentionally leaving out the holes seems a little negligent. Antec is probably hoping you’ll only be planning on typical 10.5-inch-deep gaming-PC boards when it lists the Flux Pro Noctua Edition as “E-ATX”—not a true, giant server board!

From this dead-on left-side angle, we can also see that a hole in the bottom rear corner of the bottom frame sits directly over a corresponding hole in the internal power supply mount. A magnetic screwdriver might prove useful for that part of the installation.

(Credit: Thomas Soderstrom)

Two 2.5-inch drive trays are positioned directly beneath the CPU cooler’s rear access hole on the back of the motherboard tray, and two 3.5-inch trays are on the reverse side of the front of the tray, just forward of that inward step I mentioned a moment ago. The top portion of the motherboard tray, north of the motherboard, is stepped outward toward the currently focused right side of the case to provide extra cable management space at the top of the motherboard.

(Credit: Thomas Soderstrom)

The included NA-FH1 fan hub attaches magnetically, making it easier to pull it out of the cable fray shown above and reach connectors like the SATA-style power input shown below. The hub distributes a PWM input signal from a motherboard header through its top port to up to eight fans. Its translucent parts even light up when power is applied.

(Credit: Thomas Soderstrom)

Two of the hub's five manufacturer-installed extension cables reach the lower mounts of the front fan tray, two more reach the central mounts atop the power supply bay, and the fifth approaches the rear panel’s single fan bracket. That cabling is routed very well; no winging it required.

You might have noticed the rubber grommets on the upper 3.5-inch drive tray in earlier pictures, which are designed to dampen mechanical drive vibrations. Users who don’t have any platter drives in the classic 3.5-inch desktop form factor can instead screw two 2.5-inch drives to the top of the Flux Pro Noctua Edition’s two so-labeled “Storage Units.” The photo below also gives a closer view of how an additional drive cage sits inside the power-supply bay. The cage employs a 120mm fan-mount adapter plate screwed into the middle of the bottom panel’s fan mount (which is for 140mm or 120mm fans, if you choose to remove the cage).

(Credit: Thomas Soderstrom)

Loosening a single knurled screw allows that drive cage to slide off the adapter’s mounting pins. Inside is a flexible inner tray with side pins to engage 3.5-inch drives and holes to alternatively hold a drive in the 2.5-inch form factor. Outside, the top features mounting holes for attaching a second 3.5-inch drive, plus a removable 2.5-inch drive tray that must be left out if you want to install that second 3.5-inch drive.

Removing the entire cage clears room to rear-mount an ultra-long power supply up to the case's internal depth (470mm), a smaller power supply and some fans, or even a mid-size radiator.

(Credit: Thomas Soderstrom)

Building With the Flux Pro Noctua Edition

The inclusion of four NF-A14x25 G2 PWM and two NF-A12x25 G2 PWM fans is the biggest reason why the $399 Noctua Edition of Antec’s Flux Pro costs $219 more than Antec’s $179 original. I looked up Newegg’s prices and found the former fans for $85 a pair and the latter fans for $65 a pair. That adds up to a $235 fan package, so going brown with the Noctua Edition saves those who want these specific fans $15 compared with configuring the combo themselves.

(Credit: Thomas Soderstrom)

Of course, you may wish to add a few other things, such as a motherboard, after you’ve installed those fans. The Flux Pro Noctua Edition’s installation kit includes a user manual; two Noctua-brown covers for the power supply shroud’s open fan holes; a 40mm Noctua-fan keychain (yes, it looks real; no, you can’t power it up); and a bracket for mounting your power supply with its power socket exiting the rear of the case, in place of the manufacturer-installed socket plate. 

You also get a hardware organizer with various screw packs, a Phillips-drive standoff socket, five zip ties, and a decorative sample of the front panel’s wood. The screw packs include the following hardware potpourri:

• 26 M3 shoulder screws for engaging motherboard standoffs and 2.5-inch drive mounting holes
• Four #6-32 combo-head power supply screws
• Three standoffs (even though the case lacks the extra holes to use them with SSI-EEB boards)
• Eight shoulder screws for the installation of 3.5-inch drives within the Storage Unit bays
• Two replacement screws to secure the power-supply extension cable to its adapter plate
• Four screws for securing the power-supply shroud’s fan-hole covers mentioned above.

(Credit: Thomas Soderstrom)

Once my test hardware was installed, I connected the system’s power and reset buttons via a nine-pin combined F_PANEL block, its headset combo jack via the usual HD Audio block, its temperature display panel via a nine-pin USB 2.0 block, its Type-C port via a Gen 2x2 (Type-E) internal header cable, and its two Type-A ports via a 19-pin USB Gen 1 cable.

(Credit: Thomas Soderstrom)

I also connected the case’s fan hub to one of the motherboard’s PWM headers, and the fan hub’s input power to a SATA drive power cable from the power supply.

Antec recommends mounting the fan kit’s two 120mm fans as updrafts from the power supply, which is why two of the PSU shroud’s cover panels come in the installation kit instead of being manufacturer-installed. Three of the included 140mm fans were mounted to the front as intakes, and one to the rear as an exhaust. All were mounted via screws, since the noise-damping rubber pins didn’t hold the 140mm fans securely enough for my liking.

I also chose to use the power supply’s default mounting orientation, rotating the rear panel’s extension cable jack plate 180 degrees to help manage the cable’s excess length. You can see the usual “back” of the power supply in the image below, in the lower left of the case.

(Credit: Thomas Soderstrom)

The Flux Pro Noctua Edition’s front mesh is airy enough to give you a full visual of its brown-and-tan Noctua fans. Also, note that the digital readout on the left side of the case is now lit. Antec’s CPU and GPU temperature indicators indicate perfectly the no-load condition under which this photo was taken.

(Credit: Thomas Soderstrom)

Note that the display wouldn’t show anything without a piece of software, the Antec iUnity utility, installed. I had to search it out, as the case’s documentation only provides a QR code to a different case model. 

(Credit: Antec)

The top panel’s function mode button allows a user to disable the CPU, GPU, or both readouts, but that function is limited to briefly flashing double dashes (--) upon a black screen before loading software.

Testing the Antec Flux Pro Noctua Edition

At PCMag, we established the following hardware as our standard for testing cases two years ago, and continue using it in today’s review. This the ATX version of our test kit.

I was very selective regarding the comparison cases listed below in our charts, specifically choosing high-airflow models for today’s group rather than simply picking those of similar price.

I did give a nod toward wooden trim when selecting two comparison models, though (the Fractal Design North Momentum and the Lian Li Lancool 217), but you’ll notice that the Lancool 217 barely trails the brilliant Cooler Master MasterFrame 600 in CPU-temperature reduction while the Flux Pro Noctua Edition finds itself in a four-place tie. 

The rear exhaust fan, meanwhile, moves the Flux Pro Noctua Edition into a three-way first-place tie in voltage-regulator temperature, and I have a feeling that its center fans might be, in part, what to thank for its second-place tie in GPU temperature. All good, strong showings.

Given that the Fractal Design North Momentum finished last in two of our thermal metrics, I'm not surprised to see it take first place in noise containment. Balanced against its good thermal management and wealth of fans, the Flux Pro Noctua Edition’s second-place noise measure appears more than sufficient.

Indeed, that acoustic reading is worthy of praise, given that the Flux Pro case employs six Noctua fans plus two non-Noctuas on our test 240mm liquid cooler.