SP850B Lian Li semi-passive 850W SFX PSU

High-Density SFX Power Supply Architecture for GPU-Ready SFF Platforms with the SP850B

The SP850B is an 850W SFX fully modular PSU engineered for compact workstations and edge compute nodes that still require enterprise-grade GPU power delivery. Its short-depth SFX form factor supports dense ITX/SFF chassis layouts while maintaining clean cable routing and serviceability through fully modular cabling.

Designed for modern CPU and GPU platforms, the SP850B provides dual EPS12V outputs for current workstation-class processor power budgets and a native 16-pin PCIe 12VHPWR interface for contemporary discrete GPUs. The connector set also includes multiple 6/8-pin PCIe outputs for mixed accelerator and add-in card configurations. Efficiency targets align with 80 PLUS Gold and ErP Lot 6 requirements, helping reduce waste heat in constrained enclosures. For acoustic control in office-edge environments, a 92 mm fan with semi-passive behavior supports low-noise operation while preserving thermal headroom under sustained load.

Why Choose the SP850B?

The SP850B balances density-to-performance for deployments where chassis volume and airflow are limited but compute requirements remain high. By combining high-efficiency conversion, modular cabling, and GPU-oriented power interfaces, the SP850B simplifies scalable SFF builds, reduces integration risk, and supports predictable power delivery for sustained enterprise workloads.

Lian Li applies a mechanical-first engineering philosophy focused on tight tolerances, repeatable assembly, and component integration suited to modern data centre and edge standards. The SP850B reflects this approach with an emphasis on reliability, compliance-oriented efficiency, and practical maintainability in compact systems.

Key Applications:

• Small-form-factor GPU workstations
• Edge AI inference nodes
• Compact virtualization hosts
• High-density ITX compute clusters
• GPU-ready engineering desktops

At Happyware - Server Hardware you benefit from non-binding offers tailored to your deployment and bill-of-materials requirements for SP850B-based SFF platforms, ensuring fast procurement alignment for project rollouts. For long-life installations, you can also extend the warranty up to 6 years to protect capital investment across refresh cycles.