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Silver 1U power supply unit with rear fan grille and side label

KHACHIMO

KHACHIMO 280W ATX Power Supply 80 PLUS Gold Zero RPM Fan LLC DC-DC

SKU CH-7FCM-J2AYJ

ATX 280 W PSU with 80 PLUS Gold efficiency, zero-RPM fan mode, LLC resonant topology and DC-DC conversion for clean power and silent low-load operation

  • TypeATX
  • Modern Standby support for near-instant wake from sleep
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM fan mode stops the fan at low load
  • Resonant LLC topology with DC-DC conversion delivers clean power
  • 280 W ATX output for compact systems

280W ATX PSU for compact builds

The KHACHIMO 280W ATX power supply delivers Gold-rated efficiency and Modern Standby support in a form factor suited to 1U chassis and small-form-factor desktops. It targets system integrators and DIY builders who need reliable, low-noise power for thin clients, embedded appliances or office workstations. The unit replaces several legacy server PSUs including the POE 1U 7708N, 7908N, 7716N, 7916N and 7932N models.

Replaces older 1U units when silence matters

Upgrading from the KSA-300S2, DPS-280AB-4A, DPS-280AB-6C or DPS-280AB-M4 is worthwhile when the system spends long periods at idle and the builder wants the fan to stop completely. The resonant LLC topology with DC-to-DC conversion reduces coil whine and enables deeper sleep states, so the efficiency gain is most noticeable in always-on or frequently suspended workloads. Builders whose platforms demand higher peak wattage or additional PCIe connectors should look elsewhere.

Straightforward swap in compatible 1U housings

Installation is a direct mechanical and electrical replacement for the listed legacy models, using the same mounting points and ATX connector layout. The most common issue arises when the replacement chassis or backplane expects a different pin-out or physical keying on the main power connector; verifying the exact part number against the supplier title before ordering avoids a mismatch. No extra cables or adapters are included.

Highlights

  • Modern Standby support for near-instant wake from sleep
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM fan mode stops the fan at low load
  • Resonant LLC topology with DC-DC conversion delivers clean power
  • 280 W ATX output for compact systems

Specifications

TypeATX

Questions about this item

Does this 280W unit fit a standard ATX chassis?

It is an ATX-type supply, so it matches the standard ATX mounting pattern used in most desktop cases.

How do I enable the Zero RPM fan mode during installation?

The mode activates automatically at low and medium loads; no BIOS or software setting is required.

When should I expect to replace the cooling fan?

The fan only spins under higher loads, so its service life is extended compared with constantly spinning designs.

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