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Compare NZXT H2 Flow vs Cooler Master MasterBox 600 White

NZXT H2 Flow and Cooler Master MasterBox 600 White are both cases with the same Internal 2.5" Drive Bays (2) and Front Panel I/O (USB 3.2 Gen 1 Type A, USB 3.2 Gen 2x2 Type C). The main differences are in Internal 3.5" Drive Bays, Motherboard Compatibility, Dimensions and Volume.
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Brand
NZXT
Brand
Cooler Master
Model
CI-H21FB-01
Model
MB600-WGNN-S00
Release Date
📅 February 2026
Release Date
📅 March 2024
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews
User reviews
Price history
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Price history
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Compatible PC parts
Compatible PC parts
Type
Mini ITX Tower
Type
ATX Mid Tower
Color
Black
Color
White
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
2
Internal 3.5" Drive Bays
0
Internal 3.5" Drive Bays
2
Motherboard Compatibility
Mini ITX
Motherboard Compatibility
ATX, EATX, 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
474 mm x 230 mm x 481 mm
Volume
21 L
Volume
52 L
Max VGA length allowance
331 mm
Max VGA length allowance
360 mm
Max VGA length allowance (w/o HDD cage)
-
Max VGA length allowance (w/o HDD cage)
410 mm
Expansion Slots
3
Expansion Slots
7
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 23 months later

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Reasons to buy the Cooler Master MasterBox 600 White:

  • 63% cheaper, you can save $95.00
  • Supports back-connect
  • +2 internal 3.5" bays
  • Additional VGA length allowance (+29.00mm)
  • +4 Expansion slots
  • Supports the following motherboard formats: ATX, EATX, Micro ATX
  • Hugely more space available (+61% total case volume)

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