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Black mini-tower case with USB 3.0 front ports

Cooler Master

Cooler Master RC-342-KKR400-U3 Elite 342 400W USB 3.0

SKU CH-AKES-PA2QX MPN RC-342-KKR400-U3

A compact mini-tower chassis supporting micro-ATX and Mini-ITX builds with a 400W supply, USB 3.0 front ports and room for a 363 mm graphics card

  • TypeMini Tower
  • ColorBlack
  • Motherboard CompatibilityMicro ATX / Mini ITX
  • Front Ports2 x USB, 2 x Audio
  • Fan OptionsFront - 1 x 120mm / Rear - 1 x 80mm / Rear - 1 x 90mm / Side
  • Max GPU Length363 mm
  • Compact mini-tower fits micro-ATX builds in tight spaces
  • Front USB 3.0 ports enable fast peripheral connections
  • 120 mm front fan option delivers strong airflow
  • Supports graphics cards up to 363 mm for capable gaming
  • CPU coolers up to 153 mm keep processors cool

Compact Mini-Tower for Micro-ATX Builds

The Cooler Master Elite 342 is a black mini-tower chassis designed for Micro-ATX and Mini-ITX motherboards. It suits builders who want a small-footprint case for office or home systems. It is not for users needing full ATX motherboard support or extensive drive bays.

Thermals Noise and Power

The chassis includes a front 120mm fan mount and offers rear mounts for either 80mm or 90mm fans plus a side 90mm option. This flexibility helps maintain airflow in a compact layout. No power supply is included, so thermal performance depends on the chosen 400W unit and fan configuration.

Front Panel Connectivity and Limits

The front panel provides two USB 3.0 ports and two audio jacks for convenient peripheral access. Graphics cards up to 363mm long and CPU coolers up to 153mm tall are supported. The power supply bay accepts units up to 150mm deep, limiting choices to shorter models.

Highlights

  • Compact mini-tower fits micro-ATX builds in tight spaces
  • Front USB 3.0 ports enable fast peripheral connections
  • 120 mm front fan option delivers strong airflow
  • Supports graphics cards up to 363 mm for capable gaming
  • CPU coolers up to 153 mm keep processors cool

Specifications

BrandCooler Master
TypeMini Tower
ColorBlack
Motherboard CompatibilityMicro ATX / Mini ITX
Front Ports2 x USB, 2 x Audio
Fan OptionsFront - 1 x 120mm / Rear - 1 x 80mm / Rear - 1 x 90mm / Side - 1 x 90mm
Max GPU Length363 mm
Max CPU Cooler Height153 mm
Max PSU Length150 mm
Shipping weight6.21 kg
Package size508 × 419 × 246 mm

Questions about this item

How do I install the motherboard in the Elite 342 and which standoffs should I use?

Mount Micro-ATX or Mini-ITX boards on the pre-installed standoffs matching your form factor; the common mistake is leaving extra standoffs that short the board.

What maintenance will the Elite 342 need over time?

Clean the front intake and the 120 mm front fan filter regularly; rear 80 mm and 90 mm fans and side 90 mm fan may need replacement if bearings become noisy.

What is the first limit I hit when running a high-load GPU in the Elite 342?

The 363 mm maximum GPU length and 150 mm PSU length restrict card and power-supply choices before thermals become an issue.

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