KHACHIMO RX200S7 RX300S7 450W power supply

450W ATX Gold PSU for Modern Standby PCs

The KHACHIMO RX200S7 RX300S7 is a 450W ATX power supply built for systems that use Modern Standby sleep states. Its 80 PLUS Gold certification ensures high efficiency across typical loads. The resonant LLC topology with DC-to-DC conversion delivers clean power and supports low-power sleep modes. It suits builders wanting quiet, efficient operation in a standard ATX form factor.

Standard ATX fit with Zero RPM silence

Installation follows normal ATX mounting and cabling routines for any compatible chassis. The Zero RPM fan mode stops the fan completely at low and medium loads, removing acoustic noise during idle or light work. Resonant LLC topology and DC-to-DC conversion help minimise coil whine, a common irritant in lesser units. No special tools or adapters are required beyond a standard case and motherboard.

Check ATX clearance and Modern Standby support

Verify your case accepts a standard ATX power supply and that your motherboard and operating system support Modern Standby for the fast wake and efficiency benefits. Confirm the total system power draw stays within the 450W rating under full load. Ensure the available cable set matches your GPU and storage connectors. This unit is not for builds needing higher wattage or non-ATX form factors.