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KHACHIMO ST-500IS 500W ATX Gold power supply unit in matte black metal casing

KHACHIMO

KHACHIMO ST-500IS 500W ATX Gold Power Supply

SKU CH-EW7H-R9N69

An 80 PLUS Gold ATX unit with zero-RPM fan mode and Modern Standby support for silent, efficient power

  • TypeATX
  • Fast wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power use and heat
  • Fan stops at low load for silent running
  • LLC resonant plus DC-to-DC gives clean, stable power
  • 500 W ATX output fits compact 1U builds

Modern Standby Ready

The KHACHIMO ST-500IS is a 500W ATX power supply built for systems that demand quick wake-from-sleep response and high efficiency. Its 80 PLUS Gold certification ensures lower power draw, reduced heat output and quieter running under typical loads. This unit suits compact servers or workstations using compatible chassis such as the K39, K49, T34, R47, R44, M41, A35, S3, ZS-A4 or G5.

Efficiency and Headroom

At 500W the supply delivers enough headroom for multi-core CPUs and mid-range GPUs while maintaining Gold-level efficiency across the load range. The resonant LLC topology with DC-to-DC conversion keeps voltage regulation tight and minimises coil whine. Under sustained heavy loads the fan will engage, so silent operation is not guaranteed at maximum output.

Build Integration

Zero RPM fan mode stops the fan completely at low and medium loads, freeing the acoustic budget for noise-sensitive rack or desk-side deployments. Modern Standby compatibility enables deeper sleep states and near-instant resume without extra configuration. The ATX form factor fits standard mounting points, though cable routing space should be checked in dense 1U layouts.

Points forts

  • Fast wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power use and heat
  • Fan stops at low load for silent running
  • LLC resonant plus DC-to-DC gives clean, stable power
  • 500 W ATX output fits compact 1U builds

Caractéristiques

TypeATX

Questions sur cet article

Will the 500 W ATX Gold unit fit and power my older system that uses a 24-pin motherboard connector and 4-pin CPU plug?

The ST-500IS is a standard ATX supply with a 24-pin main connector and a 4+4-pin EPS connector that splits for 4-pin CPU sockets, so it will connect directly to legacy boards.

How can I confirm the Zero RPM fan mode is actually engaging after I install the PSU?

Under light load the fan stops completely; you can verify by listening for silence at idle and watching the fan blades remain stationary through the grille.

Which cables come attached to the ST-500IS and what might I need to add for a discrete graphics card?

Fixed cables include the 24-pin ATX, 4+4-pin EPS and peripheral leads; a PCIe power cable is not included, so a separate adapter or cable kit is required for GPU power.

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