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Rectangular black metal ATX power supply unit with cooling fan and cable bundle

KHACHIMO

KHACHIMO PS-2451-6L-LF 450W ATX Power Supply

SKU CH-4D1D-AW1HE

An ATX power supply delivering 450 W with 80 PLUS Gold efficiency, zero-RPM fan mode for silent low-load operation, and LLC resonant topology with DC-to-DC conversion for stable power

  • Product typeATX
  • Fast wake-from-sleep with Modern Standby support
  • Lower electricity draw thanks to 80 PLUS Gold efficiency
  • Silent running at low loads via Zero RPM fan mode
  • Clean, stable power delivery from resonant LLC with DC-to-DC
  • Reduced coil whine and quieter operation through advanced topology

450 W ATX power supply

The KHACHIMO PS-2451-6L-LF is a 450 W ATX power supply built for modern desktop builds that demand efficient, quiet power delivery. It targets system integrators and DIY builders who want Gold-class efficiency without moving to higher-wattage units. Buyers needing more than 450 W of continuous output should look at larger models.

Thermals, noise and low-load efficiency

An 80 PLUS Gold rating ensures high efficiency across typical loads, reducing waste heat and keeping internal temperatures lower. The Zero RPM fan mode stops the cooling fan completely at low and medium loads, delivering near-silent operation during everyday tasks. Resonant LLC topology with DC-to-DC conversion further cuts coil whine and supports modern standby sleep states.

Sustained-load behaviour

Under continuous load the resonant LLC design maintains clean, consistent power delivery while the fan spins up only as needed for thermal control. DC-to-DC conversion keeps voltage regulation tight across the 450 W rating without relying on group regulation compromises. The platform is rated for 450 W continuous output rather than a short-term peak.

How it compares

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

Price $447.99
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

How is the ATX power supply installed and which step is often missed?

Mount the unit in the case with four screws, connect the 24-pin motherboard and CPU power cables, then enable Modern Standby in the BIOS or the fast wake-from-sleep feature will not work.

What maintenance or replacement will this 450W unit need later?

The Zero RPM fan mode keeps the fan off at low loads, reducing wear; clean dust from the intake periodically and replace the unit if coil whine appears or efficiency drops below 80 PLUS Gold levels.

What limit appears first under sustained heavy load?

Continuous output is capped at 450W, so the over-power protection will trigger before thermal limits if the system draws more than that rating.

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