1 GPU RTX 4090 LLM inference Home Lab Build

This home lab system pairs 1x RTX 4090 24GB with Intel Core Ultra 9 285K for low-latency token generation for private copilots and internal assistants. It uses serviceable air cooling with easy-access filters in a homelab-friendly tower chassis and is positioned in the under-5k planning tier, suited to owner-operated lab environments with direct physical access.

Use case

LLM inference

Example system budget

$3,299 planning estimate (not live pricing).

Hardware breakdown

• GPU: 1x RTX 4090 24GB
• CPU: Intel Core Ultra 9 285K
• RAM: 128GB DDR5
• Storage: 2TB Samsung 990 PRO NVMe + 8TB enterprise SSD tier
• PSU: 1200W 80+ Gold

What This Build Includes

Includes:

• GPU(s)
• CPU
• RAM
• Storage
• Motherboard

Not Included:

• Case / chassis
• Cooling system
• Power cables / adapters
• Peripherals

Deployment Notes

• High-power multi-GPU systems require proper airflow
• Ensure PSU headroom for GPU transient spikes
• Verify motherboard PCIe lane and spacing compatibility
• Suitable for workstation or rack environments