NZXT S340 Matte ATX Mid Tower Case Specification Manual and Comprehensive Guide
The NZXT S340 Matte is a widely acclaimed mid-tower PC case that blends minimalist aesthetics with practical features for both novice builders and seasoned enthusiasts. Designed to accommodate a wide range of components while maintaining a clean and sleek exterior, the S340 Matte offers excellent build quality, thoughtful internal layout, and solid airflow capabilities. This guide provides a detailed overview of the technical specifications, design elements, and setup tips to help you get the most from your NZXT S340 Matte ATX Mid Tower Case. NZXT S340 manual
Overview of NZXT S340 Matte Case
NZXT has built a strong reputation for delivering cases that combine style and function, and the S340 Matte is no exception. This mid-tower case is built primarily for ATX motherboards but also supports Micro-ATX and Mini-ITX form factors. It’s especially popular among users who want a minimalist exterior design with a spacious, user-friendly interior.
Technical Specifications
Physical Dimensions
Width: 210 mm (8.3 inches)
Height: 428 mm (16.9 inches)
Depth: 428 mm (16.9 inches)
Weight: Approximately 6.6 kg (14.5 lbs)
Material: Steel chassis with matte painted finish and tempered glass side panel (varies by version)
Motherboard Compatibility
ATX (Standard)
Micro-ATX
Mini-ITX
Expansion Slots
7 expansion slots supporting full-height GPUs and PCI cards
Drive Bays
3.5" HDD bays: 2 internal, tool-less mounting
2.5" SSD bays: 3 (including a dedicated side-mounted bracket)
Cooling and Airflow
Fan support:
Front: Up to 2x 120 mm fans or 2x 140 mm fans
Top: 1x 120 mm or 1x 140 mm fan
Rear: 1x 120 mm fan
Pre-installed fans: Usually includes 1x 120 mm rear exhaust fan
Radiator support:
Front: Up to 280 mm radiator
Rear: Up to 120 mm radiator
Front I/O Ports
2x USB 3.0 ports
1x Audio/mic combo jack
GPU Clearance
Up to 349 mm without front radiator installed
Up to 305 mm with front radiator installed
CPU Cooler Clearance
Supports CPU coolers up to 165 mm in height
Cable Management
Approximately 22 mm of clearance behind the motherboard tray
Includes cable routing holes and tie points for clean builds
Key Features and Design Elements
Minimalist Matte Finish
The S340 Matte’s standout feature is its clean, understated exterior with a smooth matte finish. This lends a professional, modern look that fits well in a variety of environments — from gaming setups to office spaces.
Tempered Glass Side Panel
Some versions of the S340 Matte come with a tempered glass side panel, showcasing your internal components and RGB lighting effects while providing a sturdy and scratch-resistant window.
Efficient Internal Layout
NZXT designed the S340 Matte to optimize airflow and ease of installation. The interior offers a spacious main chamber for your motherboard and GPU, a dedicated compartment for your power supply, and multiple drive mounting locations that reduce clutter.
Tool-less Drive Bays
The HDD and SSD bays use tool-less mechanisms that simplify installation and removal, helping save time and reduce the risk of damage during builds.
Cable Management System
The case’s cable management features include cutouts with rubber grommets for clean routing, Velcro straps, and tie-down points behind the motherboard tray. This helps keep cables organized, improves airflow, and enhances the overall aesthetic.
Quiet Operation
The case’s design emphasizes noise reduction, using sound dampening materials and strategic fan placement to minimize noise without sacrificing cooling.
Step-by-Step Setup Tips
Step 1: Unboxing and Inspection
Unpack the case carefully and check for any physical damage.
Review included accessories, such as screws, cable ties, and manuals.
Step 2: Preparing the Case
Remove the side panels (usually held in place by thumbscrews).
Identify the PSU shroud and drive bays to familiarize yourself with the layout.
Step 3: Installing the Motherboard
Install the motherboard standoffs if not pre-installed.
Align the motherboard’s I/O shield and screw the motherboard into place.
Step 4: Mounting Storage Drives
For 3.5" drives, use the tool-less trays in the drive cage.
For 2.5" SSDs, mount on the dedicated bracket or rear of the cage.
Step 5: Power Supply Installation
Slide the PSU into the bottom compartment from the rear.
Secure with screws and route cables through the designated grommets.
Step 6: Installing Cooling Solutions
Attach fans or radiators to the front, top, or rear mounting points.
Connect fan cables to the motherboard headers or included fan hub.
Step 7: Cable Management
Route cables behind the motherboard tray using cutouts.
Use Velcro straps and tie points to secure cables and keep airflow unobstructed.
Step 8: Final Assembly
Reinstall the side panels.
Connect front I/O cables to the motherboard headers.
Power on your system to check all components are working properly.
Cooling and Airflow Performance
The S340 Matte’s design balances aesthetics with effective cooling. While the front panel is solid, it includes vents along the sides to draw fresh air in. Combined with the rear and optional top exhaust fans, the case supports a positive airflow setup that keeps components cool under load.
Users looking for enhanced cooling can add up to two 140 mm front intake fans and a 280 mm radiator for liquid cooling, making this case versatile for air or water cooling builds.
Pros and Cons
Pros
Sleek, minimalist design with matte finish
Spacious interior for high-end components
Excellent cable management options
Tool-less drive installation
Tempered glass side panel option
Good cooling and radiator support
Cons
Front panel airflow somewhat restricted compared to mesh designs
Limited front I/O ports (no USB-C)
May require additional fans for optimal airflow in demanding setups
Final Thoughts
The NZXT S340 Matte ATX Mid Tower Case strikes a great balance between style and functionality. Its clean matte finish and tempered glass panel make it visually appealing, while the internal layout supports a variety of builds — from casual office PCs to high-performance gaming rigs.
With ample room for large GPUs and coolers, tool-less drive bays, and solid cable management, the S340 Matte simplifies the building process and helps keep your setup tidy. Though its front panel airflow is not as open as some mesh-fronted cases, careful fan placement can maintain good thermal performance.
Whether you’re a beginner building your first PC or a seasoned builder seeking a clean, reliable chassis, the NZXT S340 Matte is a solid mid-tower case choice.