Replace Power 480W ATX Power Supply for HP p7-1141 - Reliable Upgrade

In this review of the Replace Power 480W ATX Power Supply for HP p7-1141, the bottom line is simple: it is a practical, higher-capacity replacement for older low-wattage units used in HP Pavilion p7-1141 and compatible models. The reviewer found it best for users who need more headroom for additional drives or midrange upgrades, because the unit delivers a guaranteed 480 watts with multiple connectors and built-in protections. This review focuses on fit, connectors, performance expectations, and whether this unit is a sensible and quiet upgrade for typical desktop repairs.

Key Features

• Compatibility: Guaranteed to fit HP 266503-001 and HP Pavilion p7-1141 systems, so it replaces common lower-wattage factory units without case modification.
• Connector set: Includes a 20+4Pin main connector, a 12V P4, two Molex, two SATA and a floppy connector, providing the connections needed for most drives and optical units.
• Higher wattage: The 480W rating gives extra capacity for adding storage or upgraded cards compared with original lower-wattage supplies.
• Protection features: Over power, short circuit and over voltage protection add a level of safety for connected components during faults or spikes.
• Quiet cooling: The low noise and low ripple fan design keeps system noise down while maintaining stable voltages under normal desktop loads.

Who It's For

The Replace Power 480W is aimed at DIY repairers and system maintainers who own an HP Pavilion p7-1141 or have a unit labeled 266503-001 and need a like-for-like replacement that also provides more power. It is well suited to users adding extra drives or replacing a failing original supply without changing other components.

It is not targeted at high-end gaming rigs or systems requiring specialized connectors beyond the provided set; users needing modular cables, extreme wattage, or customized connectors should look elsewhere. Also, those wanting fully certified enterprise-grade supplies may prefer units with broader certification listings.

Pros & Cons

Pros

• Provides 480W of headroom, useful when adding drives or modest upgrades.
• Comprehensive connector set including 20+4Pin and multiple SATA ports for typical desktop configurations.
• Built-in protections such as over power, short circuit and over voltage add component safety.
• Designed for low noise and low ripple operation, keeping desktop acoustics reasonable.

Cons

• Not a modular supply, so cable routing can be less tidy compared with modular designs.
• Not intended for extreme high-power or highly customized builds that need more connectors or certification details.

Specifications

Model Fit	HP 266503-001, HP Pavilion p7-1141
Wattage	480 Watts
Main Connector	1 x 20+4Pin
Additional Connectors	1 x 12V P4, 2 x Molex, 2 x SATA, 1 x Floppy
Protections	Over Power, Short Circuit, Over Voltage
Input	100-120V / 200-240V, 50/60 Hz, 10A/5A
Output Rails	+3.3V@28A, +5V@36A, +12V@16A, -12V@0.8A, -5V@0.5A, +5VSB@2A

Our Verdict

The Replace Power 480W ATX supply is a pragmatic upgrade for HP Pavilion p7-1141 owners who need more power and a complete set of desktop connectors. It balances expanded wattage, safety features and low-noise cooling at a modest cost, making it a sensible value for repairs and light upgrades, though enthusiasts requiring modular cables or extreme power should consider other options.

Frequently Asked Questions

Will this replace my original HP power supply?
Yes, it is guaranteed to fit HP 266503-001 and HP Pavilion p7-1141 systems and is intended as a direct replacement with higher wattage.

Does it have SATA power connectors for additional drives?
Yes, the unit includes two SATA connectors plus two Molex and one floppy connector for typical drive and optical needs.

Are there safety protections built in?
Yes, the supply includes over power protection, short circuit protection and over voltage protection for connected components.