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COOLERMASTER N300 with 420W PSU USB3.0 (NSE-300-KKR420-N2) microATX, ATX

Website price:
inc GST

COOLERMASTER N300 with 420W PSU USB3.0 (NSE-300-KKR420-N2) microATX, ATX

ARC Item Code:
Form Factor:
Mid Tower





  • Dual Super Speed USB 3.0 support
  • Includes one SickleFlow 120 fan arranged for optimum airflow in the rear with support up to 8 fans
  • Full mesh on the front panel
  • Supports 240mm liquid cooling radiator or two 120mm fans on the right side / at the top
  • Supports 120mm liquid cooling radiator in the rear
  • Can install one optional 120/140mm fan on the left side panel to cool the graphics cards
  • Supports high-end graphics cards up to 320mm / 12.6 inch, including NVIDIA GTX 690 & AMD HD 7990
  • Supports up to 8 HDDs (2 tool-less)
  • Dust filter under the PSU for easy maintenance
  • Enlarged power switch button with blue LED illuminated when the power is on






Available Color

Midnight Black


Polymer, mesh front bezel

Dimensions (W x H x D)

190 x 426 x 491.5 mm / 7.5 x 16.7 x 19.3 inch

Net Weight

5.2 kg / 11.5 lbs

M/B Type

microATX, ATX

5.25" Drive Bays

2 (exposed)

3.5" Drive Bays

1 (exposed), 7 (hidden)

2.5" Drive Bays

1 (hidden)

I/O Panel

USB 3.0 x 2 (int.), Mic x 1,

Audio x 1 (supports AC97 / HD Audio)

Expansion Slots


Cooling System

Top: 120mm fan x 2 (optional)

Front: 120mm fan x 2 or 140mm fan x 1 (optional)

Rear: 120mm SickleFlow fan x 1 (installed)

Left side: 120/140mm fan x 1 (optional)

Right side: 120mm fan x 2 (optional)

Power Supply

Standard ATX PS2 (420W)

Maximum Compatibility

VGA card length: 320 mm / 12.6 inch

CPU cooler height: 164mm / 6.4 inch