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Black ATX mid tower case with mesh front panel and four 140mm PWM fans visible

Rosewill

Rosewill Helium NAS Duo ATX Mid Tower PC Case

SKU CH-J6ST-ABYKD

ATX mid-tower case holds eight 3.5" drives plus two 2.5" bays, includes four 140 mm PWM fans and a mesh front panel for airflow, supports 360 mm top radiator, 380 mm GPU.

  • Max graphics card length380 mm
  • Housing materialSteel / Plastic
  • Supported motherboard sizesATX / E-ATX / Micro ATX / Mini ITX
  • 3.5-inch internal bays8
  • 2.5-inch internal bays2
  • Expansion card slots7

Model Helium NAS DUO

  • Store eight 3.5" drives for massive NAS capacity
  • Four pre-installed 140mm PWM fans deliver strong airflow
  • Mesh front panel enhances cooling across all components
  • Front USB 3.2 Type-C port enables fast device connections
  • Top mount supports 360mm radiator for high-end liquid cooling

Built for High-Capacity NAS Builds

The Rosewill Helium NAS Duo is an ATX mid-tower chassis designed for storage-heavy systems. It accepts ATX, E-ATX, Micro-ATX and Mini-ITX motherboards, making it suitable for DIY NAS appliances, media servers or small-business workstations. A steel and plastic frame with a black finish gives it a clean, professional appearance in any environment.

Eight 3.5-Inch Drive Bays Define Capacity

The single specification that determines fit is the eight internal 3.5-inch bays, supplemented by two 2.5-inch positions. This density allows a single chassis to hold a large RAID array without external enclosures. Seven expansion slots provide room for HBA cards or additional networking adapters needed by storage workloads.

Mesh Front and Four 140mm PWM Fans Move Air Quietly

A full mesh front panel feeds three pre-installed 140mm PWM fans at the front and one at the rear, creating strong front-to-back airflow across the drive stack. Top mounts accept up to a 360mm radiator or additional 120mm or 140mm fans for liquid cooling. Dust filters on the intakes help keep the interior clean during continuous operation.

How it compares

Measured against everything we stock in Tower & Desktop PC Cases, at today’s prices. Recalculated every night.

Price $74.99
Cheaper than about 68% of the 1,468 comparable items (median $100.99).
Max graphics card length 380 mm
Lower than about 62% of the 894 comparable items (median 400 mm).

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Specifications

Product
Brand nameRosewill
Model nameHelium Nas Duo
Product typeATX Mid Tower
Product colorBlack
Storage
3.5-inch internal bays8
2.5-inch internal bays2
Ports & slots
Expansion card slots7
Front panel ports1 x USB 3.2 Type C / 1 x USB 3.0 / Audio
Size & build
Max graphics card length380 mm
Housing materialSteel / Plastic
Dust filteringYes
Fan mounting optionsFront - 3 × 120 mm / Front - 3 × 140 mm / Rear - 1 × 120 mm / Rear - 1 × 140 mm / Top - 2 × 140 mm / Top - 3 × 120 mm
Shipping weight8.48 kg
Package size538 × 533 × 292 mm
Compatibility
Supported motherboard sizesATX / E-ATX / Micro ATX / Mini ITX
Radiator supportRear - Up to 120 mm / Top - Up to 360 mm
CPU cooler height limit180 mm
PSU length limit200 mm
More details
Included fansFront: 3 × 140 mm PWM Fans Included
Rear: 1 × 140 mm Included

Other versions of this model

2 more in the same range

Questions about this item

Can I fit eight 3.5-inch hard drives and still add a 360 mm radiator on top?

Yes. The case supports eight 3.5-inch bays and a top-mounted radiator up to 360 mm, so both can be installed together.

Will a graphics card measuring 390 mm clear the front fans?

The specifications list a maximum GPU length of 380 mm, so a 390 mm card would exceed the supported limit.

What front-panel ports are available for external drives?

The front panel provides one USB 3.2 Type-C port, one USB 3.0 port and an audio jack.

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