Lian-Li PC-Q18B vs NZXT H2 Flow Case Comparison

Lian-Li PC-Q18B and NZXT H2 Flow are both cases with the same Volume (21 L). The main differences are in External 5.25" Drive Bays, Internal 2.5" Drive Bays, Internal 3.5" Drive Bays and Motherboard Compatibility.

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Lian-Li PC-Q18B	NZXT H2 Flow
Prices (Change region) - Buy now	Prices (Change region) In Stock Free shipping $149.99 Out of Stock $189.14
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Brand Lian Li	Brand NZXT
Model PC-Q18B	Model CI-H21FB-01
Release Date -	Release Date 📅 February 2026
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews ★★★★☆ (1 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 HTPC	Type Mini ITX Tower
Color Black	Color Black
Includes Power Supply No	Includes Power Supply No
External 5.25" Drive Bays 1	External 5.25" Drive Bays 0
External 3.5" Drive Bays 0	External 3.5" Drive Bays 0
Internal 2.5" Drive Bays 0	Internal 2.5" Drive Bays 2
Internal 3.5" Drive Bays 6	Internal 3.5" Drive Bays 0
Motherboard Compatibility Mini DTX, Mini ITX, Thin Mini ITX	Motherboard Compatibility Mini ITX
Front Panel I/O USB 3.2 Gen 1 Type A	Front Panel I/O USB 3.2 Gen 1 Type A, USB 3.2 Gen 2x2 Type C
Dimensions 290 mm x 198 mm x 364 mm	Dimensions 263 mm x 181 mm x 435 mm
Volume 21 L	Volume 21 L
Max VGA length allowance 340 mm	Max VGA length allowance 331 mm
Expansion Slots 2	Expansion Slots 3
Back Connect Support No	Back Connect Support No