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Compare NZXT H3 Flow vs Phanteks XT M3

NZXT H3 Flow and Phanteks XT M3 are both cases with the same Internal 3.5" Drive Bays (1), Motherboard Compatibility (Micro ATX, Mini ITX) 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 2.5" Drive Bays, Dimensions, Volume and Max VGA length allowance.
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Prices
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In Stock
+ $0.99 Shipping
$54.99 ($59.99)
$5.00 off w/ promo code: DTA234, ends 6/26
In Stock
$59.99
Last updated 21 minutes ago.
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Prices
(Change region)
In Stock
+ $5.99 Shipping
$44.99 ($59.99)
$10.00 Mail-in rebate, $5.00 off w/ promo code: KDP248, ends 6/30
In Stock
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Brand
NZXT
Brand
Phanteks
Model
  • CC-H31FB-01
  • CC-H31FB-02
Model
  • PH-XT325M_BK01
  • PH-XT325M_DBK01
Release Date
📅 May 2025
Release Date
📅 July 2025
* 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
MicroATX Mid Tower
Type
MicroATX 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
0
External 3.5" Drive Bays
0
External 3.5" Drive Bays
0
Internal 2.5" Drive Bays
1
Internal 2.5" Drive Bays
2
Internal 3.5" Drive Bays
1
Internal 3.5" Drive Bays
1
Motherboard Compatibility
Micro ATX, Mini ITX
Motherboard Compatibility
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
389 mm x 225 mm x 400 mm
Dimensions
460 mm x 235 mm x 370 mm
Volume
35 L
Volume
40 L
Max VGA length allowance
317 mm
Max VGA length allowance
430 mm
Max VGA length allowance (w/o HDD cage)
377 mm
Max VGA length allowance (w/o HDD cage)
-
Expansion Slots
4
Expansion Slots
4
Back Connect Support
Yes
Back Connect Support
No

Comparison and key differences summary

Reasons to buy the NZXT H3 Flow:

  • Supports back-connect

Buy now

Reasons to buy the Phanteks XT M3:

  • 18% cheaper, you can save $10.00
  • +1 internal 2.5" bays
  • Additional VGA length allowance (+113.00mm)
  • Moderately more space available (+12% total case volume)

Buy now

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