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Compare NZXT H2 Flow vs H3 Flow

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  3. NZXT H2 Flow 🆚 NZXT H3 Flow
NZXT H2 Flow and NZXT H3 Flow are both cases with the same Front Panel I/O (USB 3.2 Gen 1 Type A, USB 3.2 Gen 2x2 Type C). The main differences are in Internal 2.5" Drive Bays, Internal 3.5" Drive Bays, Motherboard Compatibility and Dimensions.
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NZXT H2 Flow SFF Mini-ITX Black Tempered Glass CI-H21FB-01
NZXT H2 Flow
NZXT H3 Flow Micro-ATX Includes 1x 120mm Rear Fan Back-Connect Motherboard CC-H31FB-01
NZXT H3 Flow
Prices
(Change region)
In Stock
Free shipping
$149.99
Out of Stock
$189.14
Prices
(Change region)
In Stock
$59.99
In Stock
Free shipping
$59.99
In Stock
+ $2.99 Shipping
$59.99
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* Product prices and availability are subject to change frequently. Any price and availability information displayed on Amazon at the time of purchase will apply.
Brand
NZXT
Brand
NZXT
Model
CI-H21FB-01
Model
  • CC-H31FB-01
  • CC-H31FB-02
Release Date
📅 February 2026
Release Date
📅 May 2025
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews
User reviews
Price history
View Details ►
Price history
View Details ►
Compatible PC parts
Motherboards ► Graphics Cards ► Power Supplies ► CPU Coolers ►
Compatible PC parts
Motherboards ► Graphics Cards ► Power Supplies ► CPU Coolers ►
Type
Mini ITX Tower
Type
MicroATX Mid Tower
Color
Black
Color
Black
Includes Power Supply
No
Includes Power Supply
No
External 5.25" Drive Bays
0
External 5.25" Drive Bays
0
External 3.5" Drive Bays
0
External 3.5" Drive Bays
0
Internal 2.5" Drive Bays
2
Internal 2.5" Drive Bays
1
Internal 3.5" Drive Bays
0
Internal 3.5" Drive Bays
1
Motherboard Compatibility
Mini ITX
Motherboard Compatibility
Micro ATX, Mini ITX
Front Panel I/O
USB 3.2 Gen 1 Type A, USB 3.2 Gen 2x2 Type C
Front Panel I/O
USB 3.2 Gen 1 Type A, USB 3.2 Gen 2x2 Type C
Dimensions
263 mm x 181 mm x 435 mm
Dimensions
389 mm x 225 mm x 400 mm
Volume
21 L
Volume
35 L
Max VGA length allowance
331 mm
Max VGA length allowance
317 mm
Max VGA length allowance (w/o HDD cage)
-
Max VGA length allowance (w/o HDD cage)
377 mm
Expansion Slots
3
Expansion Slots
4
Back Connect Support
No
Back Connect Support
Yes
-

Comparison and key differences summary

Reasons to buy the NZXT H2 Flow:

  • Newer Product, it was released around 8 months later
  • +1 internal 2.5" bays
  • Additional VGA length allowance (+14.00mm)

Buy now

Reasons to buy the NZXT H3 Flow:

  • 60% cheaper, you can save $90.00
  • Supports back-connect
  • +1 internal 3.5" bays
  • +1 Expansion slots
  • Supports the following motherboard formats: Micro ATX
  • Much more space available (+41% total case volume)

Buy now

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