NZXT S340 Mid Tower Case Setup Instruction Manual
The NZXT S340 Mid Tower Case is a favorite among PC builders for its clean design, solid build quality, and user-friendly features. Whether you’re assembling your first PC or upgrading to a more modern chassis, the S340 offers an excellent balance of aesthetics and functionality. This instruction manual provides a detailed step-by-step guide on how to set up your NZXT S340 Mid Tower Case for a smooth, efficient build experience. Nzxt s340 matte atx mid tower case manuals spec
Unboxing and Preparing for Installation
When you first receive your NZXT S340, carefully unpack all components. Inside the box, you should find:
The NZXT S340 mid tower chassis
Tempered glass side panel (usually pre-installed or attached with thumb screws)
Screw pack containing motherboard screws, standoffs, PSU screws, and cable ties
User manual and warranty information
Before starting your build:
Find a clean, well-lit workspace with enough room to organize your components.
Gather essential tools, primarily a Phillips-head screwdriver.
Ground yourself to avoid static discharge by touching a metal surface or wearing an anti-static wrist strap.
Step 1: Removing the Side Panels
The NZXT S340 features a tempered glass side panel secured with thumb screws and a steel panel on the opposite side held by screws.
Locate the thumb screws at the rear edge of the tempered glass panel.
Unscrew them by hand carefully and slide the panel backward gently to remove it.
Remove the opposite steel panel by unscrewing its screws and sliding it off.
Removing the side panels gives you full access to the interior for component installation.
Step 2: Installing the Power Supply Unit (PSU)
The PSU sits at the bottom rear of the case inside the PSU shroud. Here’s how to install it:
Make sure the PSU fan is oriented correctly — typically, it should face downwards if your case has ventilation at the bottom, or upwards if not.
Slide the PSU into the PSU compartment from the rear of the case until the mounting holes align with the case’s screw holes.
Secure the PSU using the screws included in your screw pack.
Installing the PSU first helps free up space for motherboard installation later.
Step 3: Installing Storage Drives
The NZXT S340 supports multiple drive types:
Two 3.5” HDD bays located inside the PSU shroud.
Two dedicated 2.5” SSD mounts on the back side of the motherboard tray.
For 3.5” HDDs:
Remove the HDD cage if needed for easier installation (usually held with thumbscrews).
Slide your hard drive into the cage and secure it using screws or tool-less trays if your model supports them.
Slide the cage back into the chassis and fasten it.
For 2.5” SSDs:
Locate the mounting brackets on the rear side of the motherboard tray.
Use screws to attach the SSDs securely.
Step 4: Installing the Motherboard
Before installing the motherboard, check that the I/O shield is already attached to the back of the case. If not, snap it into place.
Align the motherboard with the standoff screws pre-installed in the motherboard tray.
Make sure ports fit perfectly through the I/O shield.
Secure the motherboard with screws provided in the screw pack.
The NZXT S340 supports ATX, Micro-ATX, and Mini-ITX motherboards, giving you flexibility in your build.
Step 5: Installing the CPU Cooler and RAM
With the motherboard mounted, install the CPU cooler and RAM modules as per their respective manuals. The NZXT S340 provides large cutouts on the motherboard tray for easy CPU cooler backplate installation without removing the motherboard.
Insert your RAM sticks into the appropriate DIMM slots until you hear a click.
Install your CPU cooler, whether air or liquid, following manufacturer instructions.
For AIO liquid coolers, mount the radiator in the front or top fan slots.
Step 6: Installing the Graphics Card (GPU)
The NZXT S340 supports GPUs up to approximately 381mm (15 inches), accommodating most modern graphics cards.
Remove the appropriate PCIe slot covers at the back of the case.
Align the GPU with the PCIe slot on the motherboard and firmly push it into place.
Secure the card with screws to the case’s expansion slots.
Connect necessary power cables from the PSU to the GPU.
Step 7: Connecting Power and Data Cables
Proper cable management is critical for airflow and aesthetics.
Connect the 24-pin ATX power cable and 8-pin CPU power cable from the PSU to the motherboard.
Connect SATA power cables from the PSU to storage drives.
Attach data cables such as SATA cables from storage drives to the motherboard.
Plug in front panel connectors for power switch, reset switch, USB ports, and audio jacks. Refer to your motherboard manual for exact pin locations.
Use the cable routing channels and velcro straps on the back side of the motherboard tray to secure cables neatly.
Step 8: Installing Fans and Radiators
The NZXT S340 includes two pre-installed 120mm fans (front intake and rear exhaust). You can add more fans or radiators depending on your cooling needs.
Front panel supports up to two 120mm fans or a 240mm radiator.
Top supports up to two 120mm fans (no radiator support here).
Rear supports one 120mm exhaust fan.
To install fans or radiators:
Remove the front or top panel by pulling it outward gently.
Mount the fans or radiator using included screws.
Connect fan power cables to the motherboard headers or fan controller.
Step 9: Final Checks and Power On
Before powering on, do a final check:
Ensure all cables are connected securely and neatly managed.
Verify that no cables obstruct fans or airflow paths.
Confirm that all components are properly seated and secured.
Replace the side panels and secure them with screws or thumb screws.
Connect your peripherals and power cable, then turn on the PC to check for proper boot and component function.
Troubleshooting Common Setup Issues
PC won’t power on: Double-check PSU connections and front panel switch wiring.
No display: Ensure GPU is correctly seated and monitor cable is plugged into the GPU output, not motherboard video output (unless using integrated graphics).
Overheating: Check fan orientation and airflow direction. Make sure cables aren’t blocking airflow.
No USB/audio from front panel: Verify front panel connectors are properly connected to motherboard headers.
Maintenance Tips
Regularly clean dust filters located at the front and bottom of the case.
Use compressed air to clear dust from fans and components every few months.
Keep cables organized to maintain optimal airflow.
Conclusion
The NZXT S340 Mid Tower Case offers a perfect blend of style, durability, and ease of installation. With this setup instruction manual, your PC build process will be smooth and enjoyable. From installing the PSU and motherboard to managing cables and cooling, each step has been designed with the builder in mind.
Whether building your first PC or upgrading your current rig, the NZXT S340 provides a robust, aesthetically pleasing foundation for a high-performance system.