Collection: Chassis & Expansion

Build for What's Coming, Not Just What's Here

Most infrastructure teams make the same mistake: they spec a chassis for today's workload and find themselves constrained six months later when the team grows, the model gets bigger, or the project scope expands. A chassis isn't just a metal box — it's a commitment to a growth trajectory. Choose the wrong one and you're rebuilding from scratch. Choose the right one and your infrastructure scales with you.

DVUN's Chassis & Expansion collection is built around the principle of modular forward compatibility. Every chassis we stock is selected not just for its current configuration, but for its expansion headroom: additional GPU slots, PCIe expansion bays, hot-swap drive cages, and power supply upgrade paths. Whether you're building a new compute node from scratch or expanding an existing server's capacity, this is where the physical architecture of your AI stack takes shape.

What Makes a Chassis Worth Buying?

• Expansion Slot Density: The number and type of PCIe slots determines how many accelerators, NICs, and NVMe cards your system can ultimately support. We document this clearly for every chassis in our catalog.
• Thermal Architecture: Hot-aisle/cold-aisle compatibility, fan zone configuration, and GPU clearance dimensions — all specified so your cooling design works from day one.
• Tool-Less Drive Bays: Hot-swap NVMe and SATA bays that let you add storage capacity without taking the system offline.
• Power Supply Flexibility: Redundant PSU bays with upgrade paths from 1600W to 3000W+ for high-density GPU configurations.
• Cable Management Design: Internal routing channels and tie-down points that keep airflow clean and maintenance straightforward.
• Rack Compatibility: Standard 19" EIA rack mounting with accurate U-height specifications and rail kit options for all major rack brands.

Expansion Units: When Your Server Needs More

Sometimes the right answer isn't a new server — it's a PCIe expansion unit that gives your existing system the additional slots it needs. Our external GPU expansion enclosures and PCIe switch boxes let you add accelerator capacity to servers that have run out of internal expansion room, without the cost and disruption of a full platform replacement. Pair with our Accelerator Cards to maximize the value of every expansion slot.

Specifications at a Glance

• Form factors: 2U, 4U, 8U rack-mount; tower configurations on select models
• PCIe slot counts: 4 to 20 slots depending on chassis class
• GPU support: up to 10x full-length, full-height, double-width cards
• Drive bays: 8 to 36 hot-swap bays (NVMe, SAS, SATA)
• PSU configurations: single, redundant, and hot-swap options
• External PCIe expansion: x16 Gen4/Gen5 over cable or switch fabric
• Airflow: front-to-rear and bottom-to-top configurations available

Your Infrastructure Deserves a Solid Frame

The chassis is the foundation everything else is built into. Get it right and every upgrade, every expansion, every hardware refresh becomes simpler. Get it wrong and you're fighting your own infrastructure. Browse the full Chassis & Expansion collection, or talk to our team about designing a chassis strategy that fits your growth roadmap. Also see our GPU Servers for complete pre-built compute platforms.