KHACHIMO 3Y H3C S6860 450W ATX power supply

ATX 450W PSU for modern standby systems

The KHACHIMO 3Y H3C S6860 delivers 450W of continuous power in a standard ATX form factor. It is built for desktops that rely on modern standby for instant wake and low idle draw. The 80 PLUS Gold certification confirms high efficiency across typical load ranges. This unit suits builders who want efficient, quiet power without over-specifying wattage.

Sustained load behaviour with zero-RPM mode

Under continuous load the resonant LLC topology with DC-to-DC conversion keeps voltage regulation tight and reduces coil whine. The fan remains off at low and medium loads, activating only when thermal demand requires it. This design maintains stable output during long work sessions or background tasks. Acoustic output stays minimal until higher power levels are reached.

Practical limits of the ATX interface

The ATX connector set defines the maximum number of devices that can be powered simultaneously. Total combined output cannot exceed 450W across all rails, so systems with multiple high-draw GPUs or many drives may hit this ceiling. Cable reach and connector count follow the ATX specification baseline. Builders needing more connectors or higher aggregate power must look beyond this form factor.