Product Overview
The Bestec ATX-250-12Z Rev. C7R is a compact, OEM-style replacement power supply primarily used in HP desktops. It’s designed to meet the original specifications of HP systems, making it a reliable option when replacing a faulty or aging PSU. With a 250 W output and standardized ATX connectors, it fits into many existing HP chassis with minimal modifications.
Despite its modest wattage, this power supply delivers stable voltages across all standard rails, backing everyday computing components reliably. The internal design emphasizes safety with protections such as over-voltage and short-circuit safeguards, ensuring that the attached components stay protected even in fault conditions. Its compact form factor suits OEM enclosures where space is constrained.
Thermal and acoustic performance are balanced: an internal cooling fan helps dissipate heat during sustained loads without excessive noise. The layout allows for airflow consistent with typical HP tower chassis designs, helping maintain system reliability under continuous use. Replacement units are often bench-tested and quality checked to ensure compatibility and stability.
One advantage of staying with the Bestec ATX-250-12Z line is compatibility. It uses the same power connectors (20-pin ATX main, +12V CPU, Molex, and floppy/legacy connectors) as the original HP units. This means minimal rework is needed, and users can reuse existing wiring harnesses. Many HP models used this PSU in their small and mid-tower systems, making the part widely cross-compatible.
While it fits many systems, its 250 W rating means its capacity is limited. It’s most suitable for systems with integrated graphics or limited expansion. High-end gaming or workstation builds may need a higher-wattage, modern PSU. Also, as it is an OEM unit, certain newer power standards (e.g., modular cabling, 80 Plus rating, or extra headroom for modern GPUs) may not be present.
Installing the Bestec ATX-250-12Z Rev. C7R is relatively straightforward: it mounts into the same frame as the original HP PSU, and most screws and connectors align with OEM layouts. Care should be taken to ensure the connectors like the 20-pin main, CPU 12V, and peripheral cables are properly seated. Testing after installation using a multimeter or diagnostic tool is recommended before powering up your system to prevent damage.
With consistent usability, direct compatibility, and a reputation for dependability in HP systems, the Bestec ATX-250-12Z Rev. C7R is a practical replacement for systems that originally used the 5188-2623 PSU. It restores original operating conditions without forcing major reconfiguration or modification of the host PC.
Key Specifications:
Model: Bestec ATX-250-12Z Rev. C7R (HP P/N 5188-2623)
Maximum Power Output: 250 Watts
Input Voltage & Current: 100–127 V at 6 A or 200–240 V at 3 A
Connectors: 20-pin ATX main, 4-pin CPU 12V, multiple Molex/IDE, floppy connector
Dimensions: ~150 × 140 × 86 mm (L × W × H) Newegg Business
Regulation Accuracy: Load regulation ~3–5% Newegg Business
Protections: Over-voltage protection and short-circuit protection on outputs
Cooling: Internal fan for active cooling
Use Case: OEM HP desktops, systems needing drop-in PSU replacement
Get the Bestec ATX-250-12Z Rev. C7R (HP P/N 5188-2623) 250W replacement power supply—OEM-compatible with HP desktops, featuring standard ATX connectors, built-in protections, and easy drop-in install.