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Silver 1U 400W ATX power supply unit with rear fan grille and modular cable sockets

KHACHIMO

KHACHIMO 1U 400W Power Supply P1H-5407V

SKU CH-K8MD-93DC5

A 400W ATX power supply with 80 PLUS Gold efficiency, zero-RPM fan mode and Modern Standby support for quiet, low-power operation

  • Product typeATX
  • Modern Standby support for near-instant wake from sleep
  • 80 PLUS Gold certification cuts power draw and heat
  • Zero RPM fan mode stops the fan at low load
  • Resonant LLC with DC-to-DC delivers clean, stable voltage
  • Compact 1U ATX form factor fits slim server chassis

Compact 400W 1U ATX PSU

The KHACHIMO 1U 400W Power Supply P1H-5407V is an ATX unit built for slim server and workstation chassis where vertical space is at a premium. Its 400 watt rating supports mainstream CPUs and single-GPU configurations in 1U rackmounts or small-form-factor desktops. 80 PLUS Gold certification means high efficiency across typical loads, reducing waste heat and electricity draw. Modern Standby compatibility enables extremely fast wake-from-sleep transitions and improved low-load efficiency for always-on deployments.

Gold efficiency with semi-passive cooling

Resonant LLC topology paired with DC-to-DC conversion delivers clean, consistent power while minimising coil whine and supporting deeper sleep states. The Zero RPM fan mode stops the cooling fan entirely at low and medium loads, yielding near-silent operation during idle or light workloads. Gold-rated efficiency keeps internal temperatures lower, which contributes to component longevity and quieter fan curves when the fan does spin. The 1U form factor dictates a compact internal layout optimised for directed airflow in dense enclosures.

Verify 1U clearance and ATX connector fit

Confirm your chassis accepts a 1U-height power supply and that the mounting holes align with the P1H-5407V bracket pattern. Ensure the ATX main power and CPU/EPS connectors reach the motherboard headers in your specific layout, as short cables are common in 1U designs. Check that total system draw under peak load stays within the 400 watt limit, especially if adding discrete GPUs or many drives. Validate that your motherboard firmware supports Modern Standby to benefit from the fast wake and low-power sleep features.

How it compares

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

Price $433.99
Pricier than about 87% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeATX

Questions about this item

What does the 80 PLUS Gold certification mean for the KHACHIMO P1H-5407V?

The 80 PLUS Gold certification confirms high efficiency operation, resulting in lower power consumption, less noise, and cooler temperatures for this 400W unit.

What form factor does the KHACHIMO P1H-5407V use for mounting?

This power supply uses a 1U form factor designed to fit standard 1U server or rackmount chassis.

How do I enable the Zero RPM fan mode on this PSU?

The Zero RPM fan mode activates automatically at low and medium loads; the cooling fan switches off entirely for near-silent operation without any manual configuration.

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