BN323 Be Quiet! TFX Power 3 300W Active 300W TFX Desktop PSU

Compact TFX Server Power Supply with High-Efficiency AC-to-DC Conversion using the BN323

The BN323 is a 300W TFX form factor power supply unit designed for compact server and industrial chassis where mechanical compatibility and stable DC rails are mandatory. It supports ATX 2.52 signaling, provides a wide 100–240V AC input range, and uses active cooling via an 80mm rear fan to maintain thermal stability in constrained enclosures.

In small form factor platforms, the BN323 enables predictable power budgeting for entry server motherboards and modest add-in configurations. The fixed cabling harness provides direct, low-resistance distribution to core and peripheral loads, including 24-pin ATX and 4-pin ATX12V for the CPU platform, plus an 8-pin PCIe lead for a low-to-mid power accelerator or RAID/HBA card. For storage-heavy nodes, the BN323 exposes multiple SATA and Molex connectors to support mixed drive and backplane requirements without adapter sprawl, while 80 PLUS Gold efficiency (up to 91.7% peak) reduces heat density and upstream UPS load.

Why Choose the BN323?

The BN323 delivers a practical density-to-reliability profile for deployments that require TFX compliance but do not justify redundant power. With switchable multi-rail/dual 12V rail behavior and comprehensive protections (OCP, OPP, OVP, UVP, SCP), the BN323 supports controlled fault handling and consistent uptime characteristics in single-PSU architectures.

Be Quiet! engineers this platform with an emphasis on electrical stability, acoustically optimized active cooling, and protection logic aligned to modern data centre and edge standards, making integration straightforward for OEM-style builds and long-life refresh cycles.

Key Applications:

• Compact edge servers
• Small form factor storage nodes
• Industrial control systems
• Entry virtualization hosts
• Appliance-based security gateways

At Happyware - Server Hardware you benefit from non-binding offers tailored precisely to your needs for BN323-based builds and the option to extend the warranty up to 6 years, supporting predictable lifecycle planning across fleet deployments.