NZXT H2 Flow vs Corsair Obsidian Series 550D Case Comparison

The main differences between NZXT H2 Flow and Corsair Obsidian Series 550D are in External 5.25" Drive Bays, Internal 2.5" Drive Bays, Internal 3.5" Drive Bays and Motherboard Compatibility.

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NZXT H2 Flow	Corsair Obsidian Series 550D
Prices (Change region) In Stock Free shipping $149.99 Out of Stock $189.14	Prices (Change region) Out of Stock Free shipping $179.99 Out of Stock Free shipping $398.40
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Brand NZXT	Brand CORSAIR
Model CI-H21FB-01	Model 550D CC-9011015-WW CC550D
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
Includes Power Supply No	Includes Power Supply No
External 5.25" Drive Bays 0	External 5.25" Drive Bays 4
External 3.5" Drive Bays 0	External 3.5" Drive Bays 0
Internal 2.5" Drive Bays 2	Internal 2.5" Drive Bays 0
Internal 3.5" Drive Bays 0	Internal 3.5" Drive Bays 6
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 3.2 Gen 1 Type A
Dimensions 263 mm x 181 mm x 435 mm	Dimensions 530 mm x 220 mm x 495 mm
Volume 21 L	Volume 58 L
Max VGA length allowance 331 mm	Max VGA length allowance 316 mm
Max VGA length allowance (w/o HDD cage) -	Max VGA length allowance (w/o HDD cage) 452 mm
Expansion Slots 3	Expansion Slots 8
Back Connect Support No	Back Connect Support No