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NZXT

NZXT H3 Flow – Micro-ATX PC Case – Optimized Airflow – Includes 1 x 120mm Rear Fan – Supports Full-Sized GPUs – Fits 280mm Front, 240mm Top Radiator – Back-Connect Motherboard – Black

  • Based on 163 reviews
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4th of July Sale · 14% off was $69.98

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Availability: Only 5 left in stock, order soon!
Fulfilled by Amazon
Arrives Saturday, Jul 4
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Size: H3 Flow (2025)


Style: Non RGB Fans


Color: Black


Features

  • SPACE-SAVING SIZE A space-efficient micro-ATX chassis that accommodates high-performance components without compromise.
  • HIGH-AIRFLOW DESIGN Ultra-fine steel mesh on the panels and PSU shroud maximizes airflow while effectively filtering dust.
  • EXTENSIVE COOLING SUPPORT Supports up to a 280 mm radiator at the front, a 240 mm radiator at the top, and up to seven fans for powerful cooling performance.
  • FULL-SIZE GRAPHICS CARDS Fits GPUs up to 377 mm (without front fans), 352 mm (with front fans), and 317 mm (with front radiator and fans installed).
  • PRE-INSTALLED REAR FAN Comes equipped with a F120Q (CV) fan at the rear for efficient exhaust airflow right out of the box.

Description

The H3 Flow (CC-H31FB-01) is a space-efficient micro-ATX PC case delivering exceptional airflow and versatile component compatibility. Designed for optimal cooling, the mesh panels and ventilated PSU shroud keep high- performance components running smoothly.

Brand: NZXT


Motherboard Compatability: Micro ATX


Case Type: Mid Tower


Recommended Uses For Product: Gaming


Color: Black


Material: Alloy Steel


Power Supply Mounting Type: Bottom Mount


Cooling Method: Air


Model Name: NZXT H3


Item Weight: 4800 Grams


Supported Motherboard: Micro ATX


Case Type: Mid Tower


Power Supply Mounting Type: Bottom Mount


Cooling Method: Air


Total USB 3.0 Ports: 2


Other Special Features of the Product: Tool-Free Entry, Tempered Glass Side Panel


Internal Bays Quantity: 7


Compatible Devices: Micro-ATX motherboards, full-sized graphics cards, various cooling systems (radiators and fans), standard power supply units, storage drives, and expansion cards


Color: Black


Enclosure Material: Alloy Steel


Antenna Location: Gaming


Item Weight: 4800 Grams


Brand: NZXT


Model Name: NZXT H3


Manufacturer: NZXT


UPC: 810074848046


Global Trade Identification Number: 88


Mfr Part Number: CC-H31FB-01


Model Number: CC-H31FB-01


Warranty Description: 2 Year Manufacturer


Unit Count: 1.0 Count


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jul 4

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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View our full returns policy here.

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Top Amazon Reviews

    • Great value mATX case!
Size: H3 Flow (2025) Style: Non RGB Fans Color: White
I recently used the NZXT H3 Flow for a Micro-ATX gaming PC build, and I came away impressed with how easy it was to work in for a case of this size. The overall design is clean and modern, and the airflow-focused front panel helps keep temperatures under control without sacrificing aesthetics. Cable management was straightforward thanks to the available routing space and tie-down points. Despite the compact footprint, I didn't feel overly restricted during the build process, and there was enough room to comfortably install my components. The tempered glass side panel provides a nice view of the finished build, and the case feels sturdy once everything is assembled. I also appreciate that NZXT kept the exterior design simple and understated rather than overly flashy. If I had one minor criticism, it's that builders using larger components may want to double-check their GPU clearances before purchasing. That said, for a Micro-ATX build, the available space is used efficiently and I like how the PSU remains hidden at the bottom of the case. Overall, the H3 Flow strikes a nice balance between size, airflow, build quality, and ease of assembly. I'd have no problem using it again for a future compact gaming or productivity PC build. ... show more
Reviewed in the United States on May 29, 2026 by Techanobi
    • Very well made, like an engineer designed it, excellent airflow. Very happy for only $60. Very well made, like an engineer designed it, excellent airflow. Very happy for only $60.
Size: H3 Flow (2025) Style: Non RGB Fans Color: White
Review Image by Bryan S Dickens
Review Image by Bryan S Dickens
Review Image by Bryan S Dickens
Review Image by Bryan S Dickens
Excellent case, extremely well made and designed, especially for $60 Went thru 4 cases in the last couple months, 2 were absolute garbage quality. One was the Okinos aqua 3, a fish bowl style case, very nice and well made but a Lil too small and difficult to plug PSU cables into board. And it didn't have intake fans, only exhaust. This H3 FLOW is slightly bigger but much easier to work cables and it also can accommodate rear mounted plugs. Its the perfect M-ATX case. Not overly flashy, but great functionality and a more understated style. Its a grown-ups PC case, ok, if your a child that's grown old and have a ridiculous brightly colored over designed desk chair with a race car theme that cost way more than reasonably worth, you won't want this case. Its for people with taste and have appreciation for quality made and intelligently engineered products. You want a case that reminds people of something that you might find in a Chucky Cheese or a Showbiz Pizza. Just buy it, well made and tasteful. Even if NZXT is a terrible company that tried to horribly defraud thier customers with a corrupt PC rental scam that targeted middle school aged kids and..... it was a big scandal last year in the gamer scene. Im not a gamer, I'm and editor/content creator, so I could care less about your kids being suckered. Its a good case, buy it or go get a gawdy kids gamer case. ... show more
Reviewed in the United States on December 6, 2025 Reviewed in the United States on December 6, 2025 by Bryan S Dickens
    • Function + Form!
Size: H3 Flow (2025) Style: Non RGB Fans Color: Black
beautiful smaller form factor case, it isn't Jonsbo C6 small, but if you want most modern GPU's to fit and good air flow this is it! The case comes with 1 stock fan side panel for wire management and simple IO with USB type C.has designated area for your PSU which is nice. I had my friend paint mine a hyper shift, and I love it. It's great price and doesn't feel cheap! ... show more
Reviewed in the United States on January 15, 2026 by Craig Collins
    • Good but a little disappointing
Size: H3 Flow (2025) Style: Non RGB Fans Color: Black
As the owner of two great H5 cases, I was excited to get the H3 for a HTPC build. The H3 is good but disappointing. The good: It's sturdy and well-constructed with good fit and finish. Installation of components was easy. The bad: Cable management was minimal, unlike the H5, despite opportunities even with its small size. Some of the pieces felt cheap. ... show more
Reviewed in the United States on February 2, 2026 by Ken M
    • Solid Case with One Design Inconvenience
Size: H3 Flow (2025) Style: Non RGB Fans Color: White
This is a really solid case overall. It feels well made, uses good quality materials, and the size is great for what I needed. Everything fits nicely, and it has a clean, well thought out design. The only downside is that the power supply has to be installed upside down, which is a bit inconvenient. It is not a deal breaker, but it is something that stood out and can be a little annoying during the build process. Aside from that, I am very happy with it for its price. It is a good case that does the job well, just be aware of that small design quirk. ... show more
Reviewed in the United States on May 7, 2026 by Mohamed Aly
    • Great micro case Great micro case
Size: H3 Flow (2025) Style: Non RGB Fans Color: Black
Review Image by Ndiego124
Great case. Bought for our second build has plenty of room for all the additional fans we’re running water to make sure we had good circulation for the micro-ATX. Everything seems to fit and work fine. Only downsides I have noticed was placement for cable management isn’t as good as the larger cases and access to the lower storage area for HDD, Power Supply, and lower fans isn’t great. Other than that it’s a great looking case with easy access to most components. ... show more
Reviewed in the United States on February 2, 2026 Reviewed in the United States on February 2, 2026 by Ndiego124
    • Very nice
Size: H3 Flow (2025) Style: Non RGB Fans Color: Black
This might be my favorite case. It has excellent airflow and for me is the perfect size, it can fit a full 4090 and micro ATX board with room to spare, but is not obnoxiously big or heavy like a full size case. NZXT makes great cases and this was also a dream to build in. Cable management was easy and nice and clean, and the case looks super slick. ... show more
Reviewed in the United States on January 2, 2026 by Gux
    • Very Good Case That Does Case Things
Size: H3 Flow (2025) Style: Non RGB Fans Color: Black
It’s a case, but it felt relatively premium. Installing things was easy. Cable management was easy. Looks good. It has okay I/O, never been a problem to me. I have no complaints.
Reviewed in the United States on April 11, 2026 by Protohex

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