HP Z220 SFF Power Supply – 240W Replacement & Compatibility Guide

Is your HP Z220 SFF workstation failing to power on? The compact 240W power supply inside these reliable workstations can wear out over time. Finding the right replacement isn’t as simple as picking any standard ATX power supply off the shelf — these units feature a proprietary design that requires specific attention. This guide covers everything you need to know about the HP Z220 SFF 240W power supply, including compatibility, specifications, and where to find the right replacement.

What Makes the HP Z220 SFF Power Supply Special?

The HP Z220 SFF (Small Form Factor) workstation uses a 240W power supply designed specifically for its compact chassis. Unlike standard desktop power supplies, this unit is proprietary — it uses a unique form factor and connector layout that makes finding a direct replacement more challenging.

Key Features of the 240W Power Supply

• 90% Efficiency Rating – Delivers excellent energy efficiency while keeping power waste minimal

• Wide-Ranging Active Power Factor Correction (PFC) – Enhances power quality and efficiency across different voltage conditions

• Energy Star Qualified – Meets strict energy efficiency guidelines for reduced electricity consumption

• Surge Tolerant – Withstands power surges up to 2000V to protect your workstation

• Low Standby Power – Consumes less than 2W in S5 (Power Off) mode, complying with FEMP Standby Power requirements

Technical Specifications

Why Can’t I Use a Standard ATX Power Supply?

The HP Z220 SFF uses a non-standard motherboard power connector. Instead of the typical 24-pin ATX connection found in most desktop computers, the Z220 SFF motherboard uses a 6-pin or 2-port 6-pin proprietary connector.

If you try to connect a standard ATX power supply directly, it will not work — the pin configurations are completely different. Fortunately, there’s a solution.

The Solution: Adapter Cables

Several manufacturers offer 24-pin to 6-pin adapter cables designed specifically for the HP Z220 SFF. These adapters allow you to use a standard ATX power supply with your Z220 SFF motherboard.

Important Compatibility Notes:

• These adapters are only compatible with HP Z220/Z230 SFF workstations

• Some adapters include a DC/DC converter to boost standby voltage from 5V to 12V for proper motherboard operation

• Always double-check pin alignment before connecting — misalignment can damage your motherboard

Important Warning: Some users report that aftermarket adapters may have incorrect pinouts or require modifications to function properly. Always verify the pin configuration matches the official HP specification before powering on your system.

Where to Find a Replacement Power Supply

Option 1: OEM Replacement

Look for genuine HP Z220 SFF 240W power supplies through trusted hardware suppliers or specialized workstation parts retailers. Always confirm listings clearly state compatibility with the Z220 SFF.

Option 2: Standard ATX Power Supply + Adapter

If an OEM replacement isn’t available, you can use:

• Any standard ATX power supply (choose wattage appropriate for your system, typically 300W–500W is sufficient)

• A 24-pin to 6-pin adapter cable specifically for HP Z220/Z230 SFF

Option 3: Check Authorized HP Parts Suppliers

Contact HP directly or check authorized parts distributors for verified OEM replacements.