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Compact 1U Flex ATX power supply unit with matte black finish and cooling fan

KHACHIMO

KHACHIMO ITX FLEX DC-DC 1U S3 K39 A35 550W 600W Power Supply

SKU CH-SE1T-50ZNM

An 80 PLUS Gold ATX power supply delivering up to 600 W with Modern Standby support, zero-RPM fan mode and resonant LLC DC-to-DC topology for quiet, efficient operation

  • Product 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 loads
  • Resonant LLC with DC-to-DC delivers clean, stable power
  • 550 W and 600 W ratings suit compact ITX builds

Compact ITX Flex Power Supply

The KHACHIMO ITX Flex unit is a DC-to-DC ATX power supply designed for small-form-factor builds that require a 1U footprint. It delivers up to 600 W peak output with a 550 W continuous rating and carries 80 PLUS Gold certification for high efficiency. Modern Standby compatibility enables extremely fast wake-from-sleep times and improved low-load efficiency.

Verify Physical and Electrical Fit

Confirm that your chassis accepts a 1U ITX Flex form factor and that the ATX connector layout matches your motherboard. The DC-to-DC topology with resonant LLC conversion provides clean power and supports deeper sleep states, so ensure your board implements the corresponding power-management features. Zero RPM fan mode activates at low and medium loads, which depends on the thermal profile of your specific configuration.

Ideal for Quiet Small-Form-Factor Systems

This supply suits builders assembling compact workstations or HTPCs who prioritise silent operation and efficient sleep states. It is not intended for full-size ATX cases that expect standard PS/2 dimensions. Buyers who need higher continuous wattage or modular cabling for extensive GPU configurations should look at larger form-factor units.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $218.99
Pricier than about 67% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeATX

Questions about this item

Does the KHACHIMO ITX FLEX power supply include all necessary cables or must any be purchased separately?

The unit ships as a DC-DC module for 1U S3 chassis; specific cable inclusion is not detailed, so verify with your case or motherboard requirements before ordering.

Should I choose the 550W LMJD-5500 or the 600W LMJD-6000 version for my build?

Select the 550W model for lower peak loads or the 600W model when extra headroom is needed; both share Modern Standby, 80 PLUS Gold, Zero RPM fan mode and LLC resonant topology.

What does the 80 PLUS Gold rating mean for daily power draw and thermals in a compact 1U system?

It guarantees at least 80% efficiency at typical loads, reducing waste heat and allowing the fan to stay off longer via Zero RPM mode, which keeps a small chassis cooler and quieter.

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