KHACHIMO 300W Peak 400W ATX Power Supply Gold

Compact ATX Power Supply for Modern Standby Systems

This 300 W continuous ATX unit carries 80 PLUS Gold certification and is built for PCs that use Modern Standby sleep states. It suits small-form-factor builds or upgrades where a lower-wattage, high-efficiency supply is required. The resonant LLC topology with DC-to-DC conversion delivers clean power and helps reduce coil whine.

Practical Limits of the ATX Form Factor

The 300 W continuous rating means the supply is not suited to configurations with discrete graphics cards or multiple high-power drives. Peak output reaches 400 W for short transients, but sustained loads above 300 W will exceed the design envelope. Zero RPM fan mode operates only at low and medium loads, so heavier workloads will engage active cooling.

300 W Continuous Output Decides Fit

The single specification that determines compatibility is the 300 W continuous power rating. Systems requiring more sustained power must select a higher-wattage unit. Buyers who need greater headroom for powerful GPUs or many peripherals cannot use this supply.