KHACHIMO SD-P300ATX 450W ATX power supply

450W ATX power supply for modern standby systems

The KHACHIMO SD-P300ATX delivers 450 watts of continuous power in a standard ATX form factor. It is built for desktop PCs that use modern standby sleep states and require high efficiency at low loads. The 80 PLUS Gold certification confirms reduced waste heat and lower electricity draw across typical workloads.

Practical limits of the ATX interface

The unit follows the ATX specification, so it fits standard chassis and connects to mainstream motherboards without adapters. Its 450W rating sets the maximum combined output for all rails, meaning systems with multiple high-end graphics cards or extreme overclocks will exceed this supply. The resonant LLC topology with DC-to-DC conversion maintains tight voltage regulation within the standard’s defined tolerances.

Replaces older low-efficiency or noisy units

This supply upgrades from power supplies that lack 80 PLUS Gold efficiency or modern standby support, eliminating coil whine and enabling deeper sleep states. The zero RPM fan mode removes acoustic noise at low and medium loads where older units still spin. The jump is worth it when building or refreshing a system that idles often and values silent operation.