Description
The NZXT H3 Flow redefines the Micro-ATX form factor by balancing a space-saving 35-liter footprint with the thermal capabilities of much larger cases. Engineered with ultra-fine mesh panels and a ventilated power supply shroud, it ensures critical components stay cool under heavy workloads. Its standout feature is native support for back-connect motherboards, allowing builders to achieve a pristine, wireless look that was previously difficult in small-form-factor builds.
This product is for:
- Performance-focused gamers who need a compact M-ATX footprint without sacrificing GPU length or cooling potential.
- Aesthetic enthusiasts looking to build a "zero-cable" PC using ASUS BTF or MSI Project Zero back-connect motherboards.
- Content creators requiring a small-form-factor workstation that supports dual-fan radiators and high-clearance CPU air coolers.
- First-time builders who value tool-less panel access and integrated cable management channels for a stress-free assembly.
- Minimalist desk setup users who want a sleek, modern chassis available in matte black or white to match their workspace.
Detailed specifications:
- Dimensions: 400mm (H) x 225mm (W) x 389mm (D); 35.0L Volume.
- Motherboard Compatibility: Micro-ATX, Mini-ITX (Supports Back-Connect).
- GPU Clearance: Up to 377mm (no front fan), 352mm (with front fan), 317mm (with radiator).
- CPU Cooler Height: 170mm maximum clearance.
- Cooling Support: Front (up to 280mm radiator), Top (up to 240mm radiator), Rear (120mm included).
- Storage: 2x 2.5" SSD slots, 1x 3.5" HDD slot.
- Front I/O: 1x USB 3.2 Gen 2x2 Type-C, 1x USB 3.2 Type-A, Audio Jack.
Building in the H3 Flow feels intuitive thanks to NZXT’s commitment to user-friendly design. The tool-less top, front, and side panels pop off easily, providing wide-open access to the interior for quick upgrades. Cable management is simplified by a 31.5mm deep routing space and dedicated channels, which is particularly beneficial when using traditional motherboards. For those opting for back-connect technology, the H3 Flow provides the necessary cutouts to hide all power and data cables behind the motherboard tray. The pre-installed F120Q fan provides immediate exhaust, while the mesh shroud allows the bottom-mounted fans to pull fresh air directly toward the GPU, preventing thermal throttling during intense gaming sessions.
Compared to the larger H5 Flow, the H3 Flow offers a more desk-friendly size while maintaining similar GPU compatibility and cooling flexibility. While many M-ATX cases struggle with high-end air coolers, the H3 Flow’s 170mm clearance accommodates flagship towers like the Noctua NH-D15. Unlike standard budget M-ATX cases, the H3 Flow includes a high-speed USB-C 2x2 port on the front I/O and specialized support for the emerging back-connect motherboard standard, making it a more future-proof choice for modern PC enthusiasts.
Q&A:
- Does the NZXT H3 Flow support the ASUS BTF or MSI Project Zero motherboards? Yes, the H3 Flow is specifically designed with cutouts to support Micro-ATX back-connect motherboards for a cable-free interior.
- What is the maximum GPU length supported with a front radiator installed? When a front radiator and fans are installed, the GPU clearance is approximately 317mm.
- Can I install a 280mm liquid cooler in this case? Yes, the front panel supports radiators up to 280mm, while the top panel supports up to 240mm.
- How many fans can be installed in the H3 Flow? The case supports up to seven fans: 2x 120/140mm in front, 2x 120/140mm on top, 2x 120mm on the bottom, and 1x 120mm at the rear.
- Is the tempered glass panel tinted? The black version of the H3 Flow features a dark-tinted tempered glass panel, while the white version uses clear tempered glass.
