1. Compatibility and Performance: This 550W power supply is designed for HP Z2 Z1 800 880 G4 G5 G6 models, ensuring a perfect replacement for the old device and seamless integration with your system specifications, ensuring compatibility and optimal performance, and is an excellent choice for system upgrades or replacements. 2. Durable and easy to install: this power supply can withstand continuous use, ensuring a long life and reliability for your computing needs. Equipped with all necessary connectors and cables, it can be easily installed in an existing setup without professional assistance. 3.Comprehensive Model Replacement: Directly replaces several model numbers including L75200-004,L75200-001,L77487-001,L76557-001,PA-5551-1HA,PA-5501-2,PA-3401-2HA, making it a versatile choice for various HP setups. 4.Technical Specifications: AC input is 100-240V-6.6A, 50-60Hz, DC output +12.1VMAIN&+12.1VCPU1&+12.1VCPU2&+12.1VG1&+12.1VG2 total power cant exceed 550W. 5.Customer Guarantee and Support: Each device undergoes strict quality inspection before shipment. Our products are equipped with multiple protection functions to ensure safety from overvoltage, undervoltage, short circuit and overtemperature. It is designed to protect your components. Note: Please verify interface compatibility before purchase. Model Name:PA-5501-1HA Power Supply Compatible Devices:Compatible with for HP Z2 Z1 800 880 G4 G5 G6 Connector Type:ATX, PCI Express Output Wattage:550 watts Power Supply Design:Internal PCI-Express Connector Configuration:PCI Express Colour:Silver Material:Metal Package Contents: 1 x Swap power supply Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/-