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After debuting an immediately popular Mini-ATX gaming PC case in 2025, NZXT has doubled down on the smaller PC building market by unveiling its new H2 Flow chassis. For those of us who are rusty on PC size acronyms, ITX is the smallest size of desktop motherboard, which usually means a lot of quirks and unwelcome compromises while trying to cram the beefiest graphics cards, AIO coolers, and up-to-date components inside your gaming PC.
As someone who tends to favour these smaller builds, I'm a sucker for a clever case design, and NZXT actually looks to have taken a lot of inspiration from the case I used for my first-ever build, the Corsair 2000D Airflow RGB. Where that chassis had some upside-down and back-to-front innards though, NZXT seems to have made improvements that will result in a much easier building process.
The NZXT H2 Flow will have room for a GPU that's up to 331mm in length, as well as an AIO cooler that's up to 240mm. So far, it's only available in black, but in what seems like a first for ITX cases, there's even a smaller transparent panel which mimics the fishbowl design of most regular-sized ATX PC cases. For the most part, however, the H2 Flow's design is dominated by mesh walls that allow for the most subtle of peeks behind the curtain.
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But it does look eerily similar to Corsair's ITX case, which was plenty innovative in its own right. The 2000D Airflow series was the first ITX PC chassis that could fit a full-sized 360mm AIO inside it at the time, which, in fairness, the H2 Flow still can't actually do.
But it does seem like that slight compromise has come with more benefits and practical design points that will make building in the H2 Flow a bit less complicated. For starters, the PSU is mounted to the bottom of the case, which won't mean an annoying custom power cable trailing out of the top, like it does in Corsair's. Similarly, the motherboard here isn't inverted, meaning that all of your IO cables will route out of their usual place on the back of the case, as opposed to out the bottom.
NZXT has also placed a lot more cable ties and dedicated pathways for cable management to minimize clutter. This can be a particularly tricky part of small-form-factor PC building because with less room in a chassis, cables can end up stealing any and all space for air to flow through.
Speaking of airflow, the H2 Flow comes with two pre-installed 120mm exhaust fans in its top. The general idea seems to be that an AIO in the front of the H2 Flow will pull air inside, the PSU will take air from the side panel and exhaust it out of the rear, and most heat will be dissipated through those pre-installed top fans.
The biggest quirk of the build also seems to be taken care of, since your GPU will need to be inverted and separated behind your motherboard in order to fit. Thankfully, NZXT has made that part easy, because there's a PCIe Gen 5 riser cable already installed in the case. Admittedly, that does mean your display cables will need to route out of the underside of the case, which isn't ideal, but a small price to pay for a practical ITX build.
The H2 Flow, like the H3 Flow before it, seems to be landing well with customers already, with most YouTube comments on the reveal video filled with positive feedback. I haven't gone hands-on with the chassis yet, but I'll be keeping it in mind for my next SFF build. Clearly, NZXT is looking to support that smaller size of gaming rig, and its own comment on the reveal video above tells me it understands the assignment: "smol".
For your next build, have a gander at the best graphics card, the best CPU for gaming, and the best RAM for gaming.
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