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Rectangular ATX power supply unit in matte black finish

KHACHIMO

KHACHIMO For CSU501B ATX PSU 80 PLUS Gold

SKU CH-00B9-4NR9Q

ATX power supply for CSU501B with 80 PLUS Gold efficiency, Modern Standby support, Zero RPM fan mode and resonant LLC topology with DC-to-DC conversion

  • Product typeATX
  • Modern Standby compatible for extremely fast wake-from-sleep
  • 80 PLUS Gold certified for high efficiency and lower power consumption
  • Zero RPM fan mode stops the fan at low loads for near-silent operation
  • Resonant LLC topology with DC-to-DC conversion provides clean power and reduces coil whine
  • Designed for CSU501B ATX power supply units

Modern Standby ATX Accessory

This KHACHIMO accessory is designed for the CSU501B ATX power supply and supports Modern Standby functionality. It suits builders who want extremely fast wake-from-sleep times and improved low-load efficiency in compatible systems. Buyers needing accessories for non-ATX form factors or power supplies without Modern Standby support should look elsewhere.

80 PLUS Gold Efficiency Headroom

The supported CSU501B unit carries 80 PLUS Gold certification, delivering high efficiency that reduces power consumption, noise, and operating temperatures. At low and medium loads the Zero RPM fan mode stops the cooling fan entirely for near-silent operation. Systems demanding higher certified efficiency tiers or active cooling at all loads will not match this specification.

Resonant LLC with DC-to-DC Topology

Resonant LLC topology combined with DC-to-DC conversion provides clean, consistent power while reducing coil whine for quieter operation. This design also enables the use of more energy-efficient sleep states supported by the power supply. Builds requiring a different internal topology or lacking DC-to-DC conversion on the secondary side are not served by this accessory.

How it compares

Measured against everything we stock in Case Brackets, Kits & Add-Ons, at today’s prices. Recalculated every night.

Price $529.99
Pricier than about 91% of the 262 comparable items (median $23.99).

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Specifications

Product
Product typeATX

Questions about this item

Will the CSU501B ATX unit work with my older motherboard that uses a 24-pin and 4-pin CPU connector?

The CSU501B is a standard ATX power supply, so it provides the 24-pin main connector and 4+4-pin CPU connector used by older boards.

How can I confirm the Zero RPM mode is active after I install the CSU501B?

Under light loads the fan stops completely; you can verify silent operation by listening for no fan noise while the system idles.

Does the CSU501B package include modular cables or must I buy them separately?

The unit ships with all fixed cables attached, so no separate cable kit is required for a typical build.

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