How easy is it to install components in this case?

Easy to pop the 3.5" bays out. Kind of a pain to have to pull all of the drives out to replace a single drive further down the stack. if you only screw the drives in on one side that is fairly easy. Metal feels soft so if you're experimenting and swapping a ton of components might want another case. for my use as a nas that I'm rarely inside the case of works. fine.

What is the maximum GPU length supported by the Rosewill Helium NAS case?

The maximum GPU length supported by the Rosewill Helium NAS case is 280 mm.

What are the cooling options available for the Rosewill Helium NAS case?

The cooling options for the Rosewill Helium NAS case include support for 3 x 120mm or 3 x 140mm fans at the front, 3 x 120mm or 2 x 140mm fans at the top, and 1 x 120mm or 1 x 140mm fans at the rear. It also comes with 4 pre-installed fans: 3 x 140mm at the front and 1 x 140mm at the rear.

Is there a need for power supply cable extensions, to motherboard, cpu, gpu?

I had no issues connecting power to anything. Motherboard, CPU, GPU, case accessories, or drives. All cable routing was easy with the more then ample cable slots stamped in. The provided cable management supplies were…underwhelming, but I had that covered from previous builds.

Where is the 3rd 2.5" SSD slot? I see 2 x 2.5" SSD slots behind the motherboard but no idea where the third mount is.

Pretty sure you mount it on top of the 3.5 inch bay in the power supply basement.

Is this case suitable for a home server?

This is exactly why I bought this case, to build a home games server for my family. Working great so far.

What is the LxWxH of the case?

Dimensions: 230.00 x 485.30 x 474.42 mm (W x H x D) per the user manual

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Main image of Rosewill Helium NAS | ATX Mid Tower Computer Case | Mesh Panel | 4 x 140mm PWM Fans | Supports up to 13 Hard Drives | USB 3.1 Type C | Ideal for DIY NAS, media servers, or small business applications - Black

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Alt view image 7 of 10 - Rosewill Helium NAS | ATX Mid Tower Computer Case | Mesh Panel | 4 x 140mm PWM Fans | Supports up to 13 Hard Drives | USB 3.1 Type C | Ideal for DIY NAS, media servers, or small business applications - Black

Alt view image 8 of 10 - Rosewill Helium NAS | ATX Mid Tower Computer Case | Mesh Panel | 4 x 140mm PWM Fans | Supports up to 13 Hard Drives | USB 3.1 Type C | Ideal for DIY NAS, media servers, or small business applications - Black

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Rosewill Helium NAS | ATX Mid Tower Computer Case | Mesh Panel | 4 x 140mm PWM Fans | Supports up to 13 Hard Drives | USB 3.1 Type C | Ideal for DIY NAS, media servers, or small business applications - Black

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Model: Helium NAS

Helium NAS
Helium NAS DUO
Helium NAS MAX
Retro NAS

Maximized Airflow: All-mesh side panels allow for unrestricted airflow, ensuring optimal cooling performance and preventing thermal throttling of critical components.
Quiet, Efficient Cooling: Four included 140mm PWM fans deliver silent, efficient cooling, maintaining system stability even under heavy workloads, while reducing noise levels for a peaceful computing environment.
Massive Storage For Home Server: Supports up to 10 x 3.5" HDD and 3 x 2.5" SSD, providing ample storage capacity for large media libraries, virtual machines, and other data-intensive applications, making it ideal for home servers and data storage needs.
Versatile Compatibility: Supports ATX motherboards and 360 AIO Radiators, offering flexibility for various system configurations and high-performance cooling solutions, accommodating a wide range of hardware choices.

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Rosewill Helium NAS Black ATX Mid Tower Computer Case

Model
Brand	Rosewill
Model	Helium NAS

Details
Type	ATX Mid Tower
Color	Black
Case Material	Steel / Plastic
With Power Supply	No
PSU Mount	Bottom
Motherboard Compatibility	ATX / ITX / Micro ATX
Side Panel	Mesh
Dust Filters	Yes

Expansion
Internal 3.5" Drive Bays	10
Internal 2.5" Drive Bays	3
Expansion Slots	7

Front Panel Ports
Front Ports	1 x USB 3.1 Type-C / 2 x USB 3.0 / Audio

Cooling System
Fan Options	Front: 3 x 120mm, 3 x 140mm Top: 3 x 120mm, 2 x 140mm Rear: 1 x 120mm, 1 x 140mm
Pre-installed Fans	Front - 3 x 140mm / Rear - 1 x 140mm
Radiator Options	Front: 360mm / 280mm / 240mm Top: 360mm / 280mm / 240mm Rear: 120mm

Dimensions & Weight
Max GPU Length	280 mm
Max CPU Cooler Height	180 mm
Max PSU Length	200 mm
Dimensions	19.1 x 9.05 x 18.67 inches
Weight	18 lbs

Additional Info
Features	High-Airflow with All Mesh Panels: Three mesh panels provide massive airflow to your system, ensuring maximum cooling performance. Cable Management System: A roomy 26mm of space behind the motherboard allows for quick and easy routing of all your major cables, keeping your build clean and organized. Included 4x 140mm PWM Fan Expansive Storage for Your Home Server: Designed to support thirteen hard drives, offering plenty of storage for all your gaming and data needs Modern Front Panel I/O: Features a USB 3.1 Type-C port, USB 3.0 port

Additional Information
First Listed on Newegg	February 26, 2025

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Limited Warranty period (parts): 1 year
Limited Warranty period (labor): 1 year
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Return Policies

We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2026 and December 31, 2026 you will have until January 31, 2027 to return your product.

Return for refund until: January 31, 2027
Return for replacement until: January 31, 2027
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Manufacturer Contact Info

The Rosewill Helium NAS is a black ATX mid-tower case for DIY NAS, home-server, and media-library builds, with bays for up to 10 3.5-inch HDDs and 3 2.5-inch SSDs, plus four included 140mm PWM fans.

Recommended For

DIY NAS builders who need a tower case for a large collection of 3.5-inch hard drives, with space for additional SSDs.
Home-server and media-library builders who want an ATX system with multiple drives and airflow-focused mesh panels for sustained operation.
Homelab builders assembling a storage-focused server from standard ATX components who prefer a tower chassis over a rackmount setup.
Builders planning to use mostly SATA drives who can work with fixed internal drive mounts rather than needing a hot-swap workflow.

Spec Summary

Attribute	Value
Best For	DIY NAS and media-server builds that need extensive multi-drive storage
Case Design And Motherboard Compatibility	Black ATX mid-tower case made of steel and plastic; supports ATX, ITX, and Micro ATX motherboards
Airflow And Cable Management	Three mesh panels, dust filters, and 26 mm of space behind the motherboard for cable routing
Cooling And Radiator Support	Includes four 140 mm PWM fans: three front and one rear. Supports front and top radiators up to 360 mm, plus a 120 mm rear radiator; also has additional fan-mount options
Storage Bays	Supports 10 internal 3.5-inch drives and 3 internal 2.5-inch drives
Front Panel Connectivity	USB 3.1 Type-C, two USB 3.0 ports, and audio
Power Supply Fit	Power supply not included; bottom-mounted PSU position supports units up to 200 mm long
Component Clearance And Expansion	Supports graphics cards up to 280 mm and CPU coolers up to 180 mm; includes seven expansion slots
Dimensions And Weight	19.1 × 9.05 × 18.67 inches; 18 lb
Model Identifiers	Rosewill Helium NAS

Rosewill Helium NAS | ATX Mid Tower Computer Case | Mesh Panel | 4 x 140mm PWM Fans | Supports up to 13 Hard Drives | USB 3.1 Type C | Ideal for DIY NAS, media servers, or small business applications - Black

Learn more about the Rosewill Helium NAS

Customer Reviews of the Rosewill Helium NAS

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info

Recommended For

Spec Summary

Item#: N82E16811147365

Rosewill Helium NAS | ATX Mid Tower Computer Case | Mesh Panel | 4 x 140mm PWM Fans | Supports up to 13 Hard Drives | USB 3.1 Type C | Ideal for DIY NAS, media servers, or small business applications - Black

Learn more about the Rosewill Helium NAS

Customer Reviews of the Rosewill Helium NAS

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info

Recommended For

Spec Summary