by DAN Cases$199
Utilizing a PCIe riser to achieve an innovative back-to-back design, the A4-SFX is a modern and remarkably compact enclosure that's able to support enthusiast-grade components within a svelte 7.25L design. Highlights of the A4-SFX include it's all-aluminum construction, efficient space utilization, and thermal seperation of the CPU and GPU.
In the box: A4-SFX enclosure, internal power extention cable, riser cable
The A4-SFX: Created by the community
The A4-SFX enclosure originated as a one-man project, with the goal of creating the smallest case possible that could support high-end standardized components - from Intel Core i7 processors, to powerful full-length GPUs like the GeForce GTX 1080.
The result of years of work and several generations of design, the A4-SFX today stands alone as a product that's dramatically smaller than almost all competing enclosures. As such, it's an ideal solution for SFF enthusiasts; those who need a highly portable system; users who want to reclaim desk space; and gamers who want a high-end PC experience in the living room or in other space-constrained contexts.
How it works
The A4-SFX was the first enclosure to introduce a 'sandwiched' hardware layout. To minimize the footprint and volume of the case, while segregating the individual airflow channels cooling each component, a PCIe extender is used in order to fold the GPU behind the motherboard. This singular feature enables the overall design to be possible, but many additional elements of the enclosure were needed to address and resolve the engineering challenges introduced by this radical design.
The A4-SFX's PCIe riser is all-black and of high quality, having been sourced direct from Lian Li. The internal bracket located at the front of the enclosure allows for simple mounting of either SFX or SFX-L power supplies. An internal power cable re-routes the inlet for the power supply to the rear of the case. Depending on the size of the PSU that's installed, up to two 2.5” HDDs or SSDs can be mounted in the drive bay at the front of the enclosure. The drive bay is mounted with rubber spacers, to reduce vibration and noise. Meanwhile, a third 2.5" drive can be mounted behind the front cover. A thin plastic film installed beneath the extended PCIe slot allows for all GPUs - even those without a protective backplate - to be safely be used in the case, without fear of electrical shorting with the aluminum chassis or the PSU. Finally, if additional airflow is desired, a 92mm fan or a 92mm All-In-One water cooling solution can be installed in lieu of storage in the drive bay.
Through the compartmentalization of the primary components of the computer, the PSU, CPU/motherboard and GPU each enjoy distinct air inlets and outlets for cooling. Because of this, every component is able to efficiently cool itself by drawing fresh air directly from the exterior, and then channeling heated air upward and outside of the case. Even without dedicated exhaust fans, this layout is a key contributor to the impressive cooling efficiency of the A4-SFX, compared to most other enclosures.
What reviewers are saying about the A4-SFX
Real quotes from real enthusiasts
The DAN Cases A4-SFX is an ingenious design that takes a mini-ITX gaming system down to its smallest possible dimensions.
Linus Tech Tips
Spoiler Alert: The Dan Cases A4-SFX is a fabulous little enclosure... It is beautiful, efficient, and actually rather fun to build in.
To accommodate the most powerful hardware in a space of just 7.25 liters, sounds impossible - but the DAN Cases A4-SFX is impressively successful.
One of the best cases for extreme SFF builders. Excellent build quality. Minimalist design and innovative approach.
We are impressed... The ingenious idea of realizing two seperate cooling chambers with a PCIe riser works excellently in practice.
A4-SFXv4 / A4-SFXv3
a4sfxv4_s/b / a4sfxv3_s/b
Discluding protrusions: 112mm x 317mm x 200mm
Including protrusions: 112mm x 327mm x 205mm
376mm x 170mm x 259mm
v4: One USB Type-C port; one power switch
v43 One USB 3.0 port; one power switch
Exterior: 1.5mm brushed anodized aluminum
Interior frame: 1.5mm powder coated aluminum
Maximum height: 48mm
Rear exhaust cards are recommended.
Maximum card length: 306mm (including the PCI bracket); 295mm (discluding the PCI bracket)
Maximum card width: 45mm (including a backplate); 40mm (discluding a backplate)
Maximum card height: 144mm (as measured from the bottom of the PCI slot)
2 x 2.5" drives in the drive bay
- Top drive maximum height: 15mm
- Bottom drive maximum height: 15mm
1 x 2.5" drive in the front of the enclosure
- Front drive maximum height: 9mm