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KHACHIMO ACE-121A 121W ATX power supply unit, matte black finish

KHACHIMO

KHACHIMO ACE-121A 121W ATX Power Supply 80 Gold

SKU CH-1D7P-CK2QD

An 80 PLUS Gold ATX unit delivering 121 W with zero-RPM fan mode for silent low-load operation

  • Product typeATX
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM fan mode stops the fan at low loads for silent running
  • Resonant LLC with DC-to-DC conversion delivers clean power and reduces coil whine
  • Modern Standby compatible enables faster wake-from-sleep and better low-load efficiency
  • 121 W ATX output suits compact or low-power system builds

Low-Wattage ATX Power Supply

The KHACHIMO ACE-121A is a 121W ATX unit built for compact or low-power systems that need reliable AC-to-DC conversion. Its 80 PLUS Gold certification ensures high efficiency at typical loads, reducing waste heat and electricity draw. Modern Standby compatibility allows extremely fast wake-from-sleep transitions and better low-load efficiency. The resonant LLC topology with DC-to-DC conversion delivers clean, consistent power while minimising coil whine.

Replaces Basic Low-Efficiency Units

Upgrade from an unrated or bronze-level supply when you want quieter operation and lower running costs in a small-form-factor or embedded build. The Zero RPM fan mode stops the fan entirely at low and medium loads, eliminating audible noise during light tasks. Efficiency gains are most noticeable when the system idles or runs near the bottom of the load curve for long periods. This unit is not suited for builds that demand higher continuous wattage or multiple high-power components.

Check Form-Factor and Connector Needs

Verify that your case accepts a standard ATX power supply and that the provided cables match your motherboard and peripheral connectors. Confirm the total system power draw stays within the 121W rating to avoid overload or instability. Ensure the motherboard supports Modern Standby if you want the fast wake and low-load benefits. No specific power-supply wattage recommendation is given beyond the unit's own rating.

How it compares

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

Price $583.99
Pricier than about 90% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeATX

Questions about this item

Will the 121W ATX unit fit a standard ATX case cut-out?

Yes, the ACE-121A follows the standard ATX form factor so it mounts in any case with a regular ATX power supply opening and four rear screws.

What is the common mistake when installing the 80 PLUS Gold certified PSU?

Forgetting to plug in both the 24-pin motherboard connector and the 4-pin or 8-pin CPU power cable before the first boot.

When will the Zero RPM fan need cleaning or replacement?

The fan only spins under higher loads, so dust builds up more slowly; clean it with compressed air when you service the rest of the system, and replace it only if it becomes noisy or stops spinning.

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