Codegen 2U Rackmount 405mm Deep 3 x 80mm HDB PWM Fans Included

Codegen 2U400 2U Rackmount Server Case – Compact 405mm Chassis with 3 PWM Fans

The Codegen 2U400 Rackmount Server Case is a compact 2U server chassis designed for custom rack-mounted PCs, servers, storage systems, network appliances and other space-conscious computing installations. Supporting Micro-ATX and Mini-ITX motherboards, a standard ATX power supply and multiple internal SSD/HDD configurations, it provides practical hardware flexibility within a shallow rackmount format.

The chassis measures approximately 482 x 89 x 405mm including the front handles, while the main chassis body is approximately 430 x 89 x 380mm excluding the handles. This compact depth makes the Codegen 2U400 particularly useful where a full-depth enterprise server chassis would be unnecessarily large.

Cooling is provided by three pre-installed 80mm HDB PWM fans. Each fan uses a 4-pin PWM connection, allowing a compatible motherboard to automatically adjust fan speed according to system temperatures and configured fan-control settings.

The chassis supports standard ATX power supplies up to 200mm long, graphics or expansion cards up to approximately 180mm long, four half-height expansion slots and CPU coolers up to 67mm high. Front connectivity includes one USB 3.0 port and one USB 2.0 port.

Model: Codegen 2U400   |   Distributor Code: CSCG2U400   |   EAN: 5055492415103   |   Form Factor: 2U Rackmount   |   Motherboards: Micro-ATX / Mini-ITX

Key Features of the Codegen 2U400

• Compact 2U rackmount server chassis
• Approx. 405mm overall depth including handles
• Approx. 380mm chassis depth excluding handles
• Supports Micro-ATX and Mini-ITX motherboards
• Maximum motherboard dimensions approximately 275 x 250mm
• 3 x 80mm HDB PWM fans pre-installed
• 4-pin PWM fan connections for compatible motherboard fan control
• Supports a standard ATX PSU
• Maximum PSU length approximately 200mm
• PSU not included
• Supports graphics / expansion cards up to approximately 180mm long
• 4 x half-height expansion slots
• Maximum CPU cooler height approximately 67mm
• Flexible shared mounting for up to four 2.5-inch / 3.5-inch drives, depending on configuration
• Front USB 3.0 + USB 2.0 connectivity
• Front power and reset controls
• Power and HDD activity LEDs
• 1.0mm SGCC steel construction
• Metal front bezel and metal side panel
• Ventilated upper section around the PSU area
• Optional compatible Codegen sliding rail kit available separately
• Net chassis weight approximately 4.4kg

Compact 2U Rackmount Design

The Codegen 2U400 uses a 2U rackmount form factor, providing more vertical internal space than a 1U chassis while remaining substantially more compact than conventional 3U and 4U server cases.

The chassis measures approximately:

• Including handles: 482mm wide x 89mm high x 405mm deep
• Excluding handles: 430mm wide x 89mm high x 380mm deep

The difference between the two depth figures is important. The internal chassis body is approximately 380mm deep, while the overall installed product reaches approximately 405mm including its front handles.

Is the Codegen 2U400 Really 405mm Deep?

Yes, the overall product depth including the front handles is approximately 405mm. The metal chassis itself measures approximately 380mm deep when the handles are excluded.

This distinction is useful when checking rack, cabinet and shelf depth because sufficient clearance should also be allowed behind the case for power, network and peripheral cables.

Micro-ATX and Mini-ITX Motherboard Support

The Codegen 2U400 supports Micro-ATX and Mini-ITX motherboards. Codegen's UK distributor specifies a maximum motherboard area of approximately 275 x 250mm.

This makes the case suitable for a wide variety of compact Intel and AMD systems, including server, NAS, firewall, workstation and general rack-mounted PC builds using compatible motherboards.

Does the Codegen 2U400 Support a Full-Size ATX Motherboard?

No. Despite some generic reseller database fields describing this chassis as ATX, the detailed product specification for the Codegen 2U400 lists motherboard support as Micro-ATX and Mini-ITX.

The term ATX also appears in the specification because the chassis supports a standard ATX power supply. This should not be confused with motherboard compatibility.

What Is the Maximum Motherboard Size?

The detailed Codegen distributor specification gives a maximum motherboard area of approximately 275mm wide x 250mm deep.

Standard Micro-ATX boards are normally smaller than this limit, but builders should still check motherboard dimensions and connector locations before assembly.

Three 80mm HDB PWM Fans Included

The Codegen 2U400 is supplied with three 80mm hydraulic dynamic bearing (HDB) PWM fans installed in the front cooling position.

Unlike simple fixed-speed fans, these use 4-pin PWM fan connectors. When connected to compatible motherboard fan headers, fan speed can be adjusted automatically according to motherboard temperature readings and fan-control settings.

What Is a PWM Server Fan?

PWM stands for Pulse Width Modulation. A four-pin PWM fan allows compatible motherboard or fan-control hardware to adjust the fan's rotational speed electronically.

This means the fans do not necessarily need to operate at maximum speed continuously. A correctly configured motherboard can increase airflow when component temperatures rise and reduce fan speed when less cooling is required.

Are the 80mm Fans Included?

Yes. The Codegen 2U400 includes three black 80mm HDB PWM fans.

There is therefore no requirement to purchase the three primary chassis fans separately for a standard build.

Airflow Designed for a Compact 2U Server

Thermal management is particularly important in a 2U system because components are positioned much closer together than in a conventional desktop tower.

The three front 80mm fans provide active airflow through the chassis, while additional ventilation is incorporated into the upper panel around the power-supply area.

Actual component temperatures will depend on the CPU, graphics or expansion cards, storage devices, PSU, fan-control settings, rack ventilation and ambient temperature.

Does the Codegen 2U400 Support Liquid Cooling?

No conventional radiator mounting positions are specified. Codegen lists the 2U400 as not water-cooling ready.

The chassis is primarily designed around low-profile air cooling, making CPU cooler selection particularly important.

67mm Maximum CPU Cooler Height

The Codegen 2U400 supports CPU coolers up to approximately 67mm high.

Because this is a 2U chassis, conventional tower-style CPU coolers used in desktop gaming cases will generally be too tall. Builders should choose a suitable low-profile CPU cooler that fits within the height restriction and is compatible with the processor socket and motherboard layout.

Will a Standard Tower CPU Cooler Fit?

Usually not. The maximum CPU cooler height is approximately 67mm, while many conventional tower air coolers exceed 120–160mm.

Always check the complete height of the chosen CPU cooler before purchasing components for the build.

Will an Intel or AMD Stock Cooler Fit?

Compatibility depends on the exact cooler supplied with the processor. Some low-profile stock coolers may fit within the 67mm limit while others may not.

Check the manufacturer dimensions of the exact cooler rather than assuming compatibility based only on the processor brand.

Standard ATX Power Supply Support

One useful feature of the Codegen 2U400 is its support for a standard ATX power supply rather than requiring a specialist 2U server PSU.

The maximum specified PSU length is approximately 200mm, with the power supply positioned towards the rear-right / lower section of the chassis.

Is a Power Supply Included?

No. The Codegen 2U400 is supplied as a chassis without a PSU.

A suitable standard ATX power supply must be purchased separately. Check PSU length, connector requirements and output capacity against the planned motherboard, CPU, storage drives and expansion cards.

Can I Use a Modular ATX Power Supply?

A compatible modular ATX PSU may be used provided its physical dimensions remain within the chassis limits.

In a compact 2U system, modular cabling can be useful because unused power cables can be omitted, reducing internal cable congestion. However, connector clearance should also be considered because modular sockets and cable plugs can increase the effective space required behind the PSU.

180mm Maximum GPU and Expansion Card Length

The chassis provides approximately 180mm of maximum expansion-card length.

This allows selected compact graphics cards, network adapters, RAID controllers, storage controllers, capture cards and other PCI Express devices to be installed.

Does the Codegen 2U400 Support Full-Height Graphics Cards?

The chassis provides four half-height expansion slots. Standard full-height PCIe brackets are therefore not the intended format.

A graphics card or other add-in card should use a compatible low-profile / half-height bracket and remain within the approximately 180mm maximum card-length clearance.

Can I Install a Gaming GPU?

Only selected compact, low-profile graphics cards will be suitable. Most large modern gaming GPUs use full-height brackets, substantial coolers and lengths well above 180mm, making them unsuitable for this chassis.

Check the card's length, height, thickness and bracket type before ordering.

Four Half-Height Expansion Slots

The 2U400 provides four half-height expansion slots, giving compatible Micro-ATX systems useful expansion capability despite the compact chassis height.

Potential expansion devices can include:

• Multi-port Ethernet network cards
• 10GbE network adapters
• RAID and HBA storage controllers
• SAS / SATA controller cards
• Low-profile graphics cards
• USB expansion cards
• Serial / specialist I/O cards
• Other compatible low-profile PCI Express devices

The motherboard must provide the appropriate PCIe slots and the installed cards must remain within the chassis clearance limits.

Flexible SSD and Hard Drive Mounting

The Codegen 2U400 uses shared internal 2.5-inch and 3.5-inch drive mounting positions. This allows the storage arrangement to be adapted according to whether the system uses SSDs, conventional hard drives or a mixture of both.

Codegen's distributor information describes configurations supporting up to four drives depending on the combination selected, including:

• Up to 4 x 3.5-inch drives
• 1 x 2.5-inch SSD + 3 x 3.5-inch drives
• 3 x 2.5-inch drives + 1 x 3.5-inch drive

The 2.5-inch mounting positions share physical space with the 3.5-inch drive positions, so the advertised individual bay totals should not be interpreted as seven drives being installable simultaneously.

How Many Drives Can the Codegen 2U400 Hold?

Up to four drives can be installed in supported configurations. The exact combination depends on whether 2.5-inch or 3.5-inch drives are used because several mounting positions are shared.

This arrangement can be useful for compact storage servers, NAS systems and general-purpose rack PCs that need multiple internal SATA SSDs or HDDs.

Can I Install Both SSDs and Hard Drives?

Yes. Mixed 2.5-inch and 3.5-inch storage configurations are supported.

Always plan drive locations alongside motherboard, PSU and cable routing because the available internal space is considerably tighter than in a full-size tower chassis.

Front USB 3.0 and USB 2.0 Connectivity

The front panel provides:

• 1 x USB 3.0 port
• 1 x USB 2.0 port

These ports provide convenient access for USB flash drives, keyboards, diagnostic peripherals, installation media and other maintenance devices without needing to access rear motherboard connections.

Server Power and HDD Activity Indicators

The front panel includes dedicated controls and status indicators for server operation:

• 1 x Power button
• 1 x Reset button
• 1 x green Power LED
• 1 x red HDD activity LED

These provide basic system status information directly from the rack front.

1.0mm SGCC Steel Construction

The Codegen 2U400 uses a 1.0mm SGCC steel chassis with a metal front bezel and metal side panel.

This construction is designed for rack-mounted equipment where a rigid enclosure is important for protecting installed motherboards, storage drives and expansion cards.

The front bezel is black while the main body uses a bare-metal finish.

Optional Sliding Rack Rail Compatibility

The Codegen 2U400 is compatible with Codegen's optional RK-26-EXT sliding rail kit, also distributed under the code CSCG4U500RAILSEXT.

The optional rail system uses three-section ball-bearing rails and adjusts from approximately 26 to 30 inches. The rail kit is sold separately and is not included with the standard 2U400 chassis.

Are Rack Rails Included with the Codegen 2U400?

No. The standard package does not list sliding rack rails.

A compatible Codegen rail kit is available separately where sliding installation and easier server access are required.

Suitable for Custom Rack Server Builds

The combination of Micro-ATX motherboard support, multiple drive positions, four low-profile expansion slots and a standard ATX PSU mount makes the Codegen 2U400 suitable for a variety of custom systems.

Possible applications include:

• Small business servers
• Compact file servers
• Home-lab servers
• NAS and storage systems
• Network appliances
• Firewall and router builds
• CCTV / NVR systems
• Compact rack workstations
• Monitoring and control systems
• Virtualisation lab systems
• Industrial or specialist rack-mounted PCs

Good Choice for Home Labs and Small Server Racks

At approximately 405mm overall depth, the Codegen 2U400 is substantially shallower than many enterprise rack servers.

This can make it useful for home laboratories, small-business server installations and other environments where available rack depth is limited.

Before installation, always check the internal depth of the rack or cabinet and allow additional space behind the chassis for the PSU cable, network cables, USB connections and motherboard I/O.

2U400 vs a Full-Depth Server Chassis

The main advantage of the Codegen 2U400 is its compact depth. A full-depth rack server may provide substantially more room for large motherboards, long expansion cards, extensive drive cages and redundant server PSUs, but it also requires a deeper cabinet.

The 2U400 instead prioritises a compact footprint while retaining support for Micro-ATX motherboards, standard ATX power supplies, multiple internal drives and four low-profile expansion slots.

Who Should Choose a Deeper Rackmount Case Instead?

A deeper chassis may be more appropriate if your system requires:

• A full-size ATX or E-ATX motherboard
• Long full-height graphics cards
• Large numbers of hard drives
• Full-height PCIe cards
• Large CPU coolers
• Extensive liquid cooling
• Redundant server power supplies
• More internal cable-routing space

What Should You Check Before Building in the Codegen 2U400?

• Your motherboard must be Micro-ATX or Mini-ITX and fit within the supported dimensions.
• The CPU cooler must be no taller than approximately 67mm.
• Expansion cards must use compatible half-height / low-profile brackets.
• Maximum expansion-card length is approximately 180mm.
• The standard ATX PSU should be no longer than approximately 200mm.
• The PSU is not included.
• Drive mounting positions are shared between 2.5-inch and 3.5-inch devices.
• The chassis is not designed for conventional water-cooling radiators.
• The motherboard should provide suitable 4-pin PWM fan headers or another compatible method of controlling the supplied fans.
• Check rack depth and rear cable clearance before installation.

Codegen 2U400 Technical Highlights

• Brand: Codegen
• Model: 2U400
• Distributor Product Code: CSCG2U400
• EAN / GTIN: 5055492415103
• Case Type: 2U rackmount server chassis
• Motherboard Support: Micro-ATX / Mini-ITX
• Maximum Motherboard Size: Approx. 275 x 250mm
• Dimensions Including Handles: 482 x 89 x 405mm (W x H x D)
• Dimensions Excluding Handles: 430 x 89 x 380mm (W x H x D)
• Net Weight: Approx. 4.4kg
• Body Material: 1.0mm SGCC steel
• Front Bezel: Metal
• Side Panel: Metal
• Front Bezel Colour: Black
• Chassis Body Colour: Bare metal
• Included Fans: 3 x 80mm HDB PWM
• Fan Connection: 4-pin PWM
• PSU Support: Standard ATX
• Maximum PSU Length: Approx. 200mm
• PSU Included: No
• Maximum CPU Cooler Height: 67mm
• Maximum Expansion Card / GPU Length: 180mm
• Expansion Slots: 4 x half-height
• 2.5-inch Internal Mounts: Up to 3 positions, shared
• 3.5-inch Internal Mounts: Up to 4 positions, shared
• Maximum Simultaneous Drive Count: Up to 4 in supported configurations
• Front USB: 1 x USB 3.0 + 1 x USB 2.0
• Power Button: Yes
• Reset Button: Yes
• Power LED: 1 x green
• HDD Activity LED: 1 x red
• Internal Cable Management Depth: Approx. 85mm
• Water Cooling Ready: No
• Compatible Optional Rail Kit: Codegen RK-26-EXT / CSCG4U500RAILSEXT

What's Included?

• 1 x Codegen 2U400 rackmount chassis
• 3 x 80mm HDB PWM fans pre-installed
• Screw pack
• PC speaker
• Manual

Power supply, motherboard, processor, CPU cooler, RAM, storage drives, expansion cards and sliding rack rails are not included unless explicitly stated separately by the retailer.

Why Choose the Codegen 2U400 Rackmount Server Case?

The Codegen 2U400 provides a practical foundation for building a compact rack-mounted server or specialised PC without moving to a much deeper enterprise chassis.

Its Micro-ATX and Mini-ITX motherboard support offers considerably more flexibility than Mini-ITX-only rack cases, while the ability to install a standard ATX PSU can simplify power-supply selection.

Three included 80mm HDB PWM fans provide configurable active cooling, and shared internal drive mounting supports a range of SSD and HDD configurations for storage-oriented systems. Four half-height expansion slots also provide room for compatible network, RAID, storage and low-profile graphics adapters.

With a chassis depth of approximately 380mm excluding its handles and 405mm overall, the 2U400 is particularly useful for compact server installations, home labs, small-business networks and custom rack PCs where space efficiency matters.

For builders looking for a compact 2U rackmount case with Micro-ATX support, three included PWM fans, ATX PSU compatibility and flexible internal storage mounting, the Codegen 2U400 offers a versatile platform for a wide range of rack-based systems.