NZXT H2 Flow vs Corsair Carbide Series SPEC-03 Orange Case Comparison

NZXT H2 Flow and Corsair Carbide Series SPEC-03 Orange 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	Corsair Carbide Series SPEC-03 Orange
Prices (Change region) In Stock Free shipping $149.99 Out of Stock $189.14	Prices (Change region) Out of Stock $69.99
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Brand NZXT	Brand CORSAIR
Model CI-H21FB-01	Model CC-9011054-WW
Release Date 📅 February 2026	Release Date -
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews Add a product review	User 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 ►
Type Mini ITX Tower	Type ATX Mid Tower
Color Black	Color Black/Orange
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 3
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 444 mm x 185 mm x 439 mm
Volume 21 L	Volume 36 L
Max VGA length allowance 331 mm	Max VGA length allowance 420 mm
Expansion Slots 3	Expansion Slots 7
Back Connect Support No	Back Connect Support No