We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Rectangular silver ATX power supply with fan grille and modular cable sockets

KHACHIMO

KHACHIMO 550W ATX Power Supply PSR550-12A

SKU CH-GSER-JXXP0

ATX 550 W unit with 80 PLUS Gold efficiency, zero-RPM fan mode and Modern Standby support for H3C R4900 G2 and R2900 G3 servers

  • TypeATX
  • Fast wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power use and heat
  • Fan stops at low loads for silent operation
  • Resonant LLC plus DC-to-DC gives clean power
  • Built for H3C R4900 G2 and R2900 G3 servers

For H3C R4900 G2 and R2900 G3 servers

This 550 watt ATX power supply is built specifically for H3C R4900 G2 and R2900 G3 systems. It delivers 12 volt output through a resonant LLC topology with DC-to-DC conversion for clean, consistent power. The unit carries 80 PLUS Gold certification for high efficiency and lower running costs. It targets administrators who need a direct replacement for the PSR550-12A model.

Standard ATX fit with proprietary pinout

The supply uses the ATX form factor so it slides into the server chassis without modification, but the connector pinout matches H3C specifications rather than generic ATX wiring. Installers must verify the original PSR550-12A label before fitting; forcing a standard ATX unit will damage the backplane. Zero RPM fan mode activates at low and medium loads, eliminating noise until thermal demand rises. Modern Standby compatibility enables extremely fast wake-from-sleep times.

550 watt 80 PLUS Gold on the 12 volt rail

The single deciding specification is the 550 watt continuous rating on the 12 volt rail with 80 PLUS Gold efficiency. If the server configuration draws more than this under full load, the unit will trip its protection and shut down. Buyers who need higher headroom for additional drive cages or GPU accelerators cannot use this supply.

Highlights

  • Fast wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power use and heat
  • Fan stops at low loads for silent operation
  • Resonant LLC plus DC-to-DC gives clean power
  • Built for H3C R4900 G2 and R2900 G3 servers

Specifications

TypeATX

Questions about this item

How do I confirm the PSR550-12A is delivering clean power to my H3C R4900 G2 after installation?

The resonant LLC topology with DC-to-DC conversion provides clean, consistent power and reduces coil whine; monitor system stability and listen for near-silent operation under load as indicators.

Which cables and accessories are included with the PSR550-12A and what must I purchase separately?

The supplier facts list only the power supply unit itself; assume standard ATX cables are attached and verify connector compatibility with your H3C R2900 G3 chassis before ordering any extras.

Should I choose the 550W PSR550-12A or a different capacity for my H3C R4900 G2 server?

The PSR550-12A is rated at 550W and built for the H3C R4900 G2 and R2900 G3; match this wattage to your system's power budget rather than selecting a higher or lower capacity unit.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.