Cooler Master NSE-400-KKN2

Overview

The Cooler Master NSE-400-KKN2 is a mid tower computer case designed to provide efficient airflow, easy installation, and durable performance for both new builders and experienced upgraders. It supports Micro-ATX and ATX motherboards, accommodates graphics cards up to 12.6 inches long, and CPU coolers up to 6.4 inches tall. With two pre-installed 120 mm fans and space for up to eight fans total, this case ensures your components stay cool even under heavy workloads.

Key features

• Fully meshed front panel that promotes strong airflow directly to your hardware for better cooling efficiency
• Compatibility with both Micro-ATX and ATX motherboards, offering flexibility for various system builds
• Spacious interior that fits large graphics cards and tall CPU coolers without compromising airflow
• Pre-installed dual 120 mm fans with support for up to eight fans, allowing scalable ventilation as your system demands grow
• Generous storage options with seven 3.5-inch drive trays and three dedicated 2.5-inch SSD mounts for a balanced mix of capacity and speed
• Support for liquid cooling with mounting points for a 240 mm radiator at the top or side and a 120 mm radiator at the rear, enabling quieter and more effective thermal management
• Front panel equipped with two USB 3.0 ports for fast data transfers and convenient peripheral charging
• Three removable dust filters that help keep internal components clean and reduce maintenance effort
• Midnight Black finish that offers a sleek and understated look suitable for gaming setups, studios, or living room environments

Key specs

• Form factor: Mid tower
• Motherboard support: Micro-ATX, ATX
• Maximum graphics card length: 12.6 inches
• Maximum CPU cooler height: 6.4 inches
• Pre-installed fans: 2 x 120 mm
• Maximum fan support: Up to 8 fans
• Storage bays: 7 x 3.5-inch, 3 x 2.5-inch
• Liquid cooling radiator support: 240 mm (top or side), 120 mm (rear)
• Front panel ports: 2 x USB 3.0
• Color: Midnight Black

Connectivity and compatibility

The front panel’s two USB 3.0 ports provide high-speed connections for external drives, flash storage, and charging mobile devices, making it easy to access data or power peripherals without reaching behind the case. The case’s support for standard Micro-ATX and ATX motherboards ensures compatibility with a wide range of components, from budget builds to more advanced gaming or workstation setups.

Performance and reliability

Strong airflow is a priority with the fully meshed front panel and multiple fan mounting options, which help maintain optimal temperatures for your CPU and GPU. The ability to install liquid cooling radiators adds another layer of thermal control, reducing noise and improving performance under load. Removable dust filters protect your components from debris, extending their lifespan and reducing the need for frequent cleaning.

Ideal uses and environments

This case fits well in gaming rigs, creative workstations, and home office systems that require a balance of cooling, expandability, and clean aesthetics. Its flexible storage options and cooling support make it a solid choice for users who need to manage large media libraries or run demanding applications. The Midnight Black finish blends seamlessly into various environments, from dedicated gaming rooms to professional studios.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, with tags, manuals, accessories, and original, unaltered packaging. Any item kept will be deducted from the refund. Start a return by sending us an email. Items sent back without approval may be refused or returned to the sender.

Some items are not returnable: opened TVs/combos/monitors 37″+, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method; allow 5–7 business days for the credit to post. Shipping, handling, customs duties, and import taxes are nonrefundable. If an item is used, incomplete, or not in original condition, a 30% restocking fee may apply. Direct exchanges are not offered; purchase the replacement and return the original for a refund.

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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