NZXT H2 Flow vs Fractal Design Define R4 Case Comparison

NZXT H2 Flow and Fractal Design Define R4 are both cases with the same Internal 2.5" Drive Bays (2). The main differences are in External 5.25" Drive Bays, Internal 3.5" Drive Bays, Motherboard Compatibility and Front Panel I/O.

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NZXT H2 Flow	Fractal Design Define R4
Prices (Change region) In Stock Free shipping $149.99 Out of Stock $189.14	Prices (Change region) - Buy now
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Pangoly Score (How do we rate?) -	Pangoly Score (How do we rate?) 86
Brand NZXT	Brand Fractal Design
Model CI-H21FB-01	Model FD-CA-DEF-R4-BL
Release Date 📅 February 2026	Release Date 📅 November 2013
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews Add a product review	User reviews ★★★★★ (145 reviews) Add a product review
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 ►
Pros -	Pros Great cable management Fan controller Dust filter for all intake-fans Very solid Quiet
Cons -	Cons Heavy Only 2 fans included
Type Mini ITX Tower	Type ATX 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 2
External 3.5" Drive Bays 0	External 3.5" Drive Bays 0
Internal 2.5" Drive Bays 2	Internal 2.5" Drive Bays 2
Internal 3.5" Drive Bays 0	Internal 3.5" Drive Bays 8
Motherboard Compatibility Mini ITX	Motherboard Compatibility ATX, 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 2.0 Type A, USB 3.2 Gen 1 Type A
Dimensions 263 mm x 181 mm x 435 mm	Dimensions 232 mm x 464 mm x 523 mm
Volume 21 L	Volume 56 L
Max VGA length allowance 331 mm	Max VGA length allowance 295 mm
Max VGA length allowance (w/o HDD cage) -	Max VGA length allowance (w/o HDD cage) 430 mm
Expansion Slots 3	Expansion Slots 7
Back Connect Support No	Back Connect Support No