Fractal Design looks as though it’s about to release its first new range of Define cases for over six years. Several leaks point to the imminent launch of a Fractal Design Define One, but it looks like quite a different beast from its predecessors.
The company’s Define 7 range was released way back in 2020, bringing a smart detachable roof to the design, while maintaining the range’s staple elements, such as a swing-out door with a 5.25in drive bay behind it. However, if these latest leaks from retailers are correct, the Define One looks as though it’s taking a different route.
One retailer listing the Define One for pre-order is Amazon, which also has a photo of the case. It looks like a pretty basic design, bringing some curves to the front, rather than the straight lines of previous Define cases. However, it looks as though this is a sealed, solid front, rather than an opening door.
The listing includes “closed-front design” as one of its bullet points, adding that this balances “cooling capability with a clean, refined exterior finish.” Likewise, another listing on US retailer Pro Vantage says the “Define One is a closed-front ATX PC case.” The description here says the case is “combining clean Scandinavian design with quiet gaming capability and everyday usability.”
Of course, this “closed front” could just be referring to the fact that the case has a solid, rather than vented, front panel, but it could also mean that it doesn’t open, unlike previous full-size Define cases. If that’s the case, I’m going to assume there’s no 5.25in drive bay behind that front, which would be a shame, as there’s a small (but loyal) niche of PC users who still like an optical drive in their PC, while getting a windowed-view of the interior.
I’m one of them, in fact. My own PC is built into a Fractal Design Define R6, with a DVD burner in its 5.25in drive bay, and I was eagerly awaiting the next case in the series. I know front-facing drive bays have had their day now, but I was hoping the new Define range was going to buck this trend, like its predecessors.
According to the Amazon listing, the new Define One offers up to 368mm of clearance for your graphics card, and also includes an adjustable support bracket – as feature not found in Define cases until now. Another new feature is support for back-connect motherboards, which should make for a tidy interior. There are also apparently three Momentum fans included.
Meanwhile, up to a 280mm radiator will go in the roof, according to the listings, while the front will take a 360mm rad. That former limitation suggests that the Define One is more like the Define 7 Compact than the full-size Define 7, contracting the depth of the case to make for a smaller footprint.
The Define 7 Compact also has a sealed front and no 5.25in drive bay, for reference. However, the Define One’s 482 x 235 x 500 (D x W x H) on the Amazon listing would make it considerably larger than the Define 7 Compact’s 427 x 210 x 474mm measurements.
Fractal Design hasn’t officially announced the Define One, of course, so there’s a lot we don’t know here. Maybe there will be versions with and without closing doors and 5.25in drive bays, and there may be an XL edition in future too. We won’t know all the details until if/when the case is officially unveiled by Fractal.
Amazon says the Fractal Design Define One will be released on 3 September 2026, with a price of $165.80 for the version with dark tempered glass.
