KHACHIMO 400W ATX Power Supply SG9012 071-000-548 071-000-543

400W ATX Power Supply with Gold Efficiency

The KHACHIMO SG9012 is a 400 watt ATX power supply built for desktop PCs that need efficient, quiet delivery. It carries 80 PLUS Gold certification and uses a resonant LLC topology with DC-to-DC conversion for stable output. Modern Standby compatibility enables rapid wake-from-sleep and improved low-load efficiency. A zero RPM fan mode stops the fan entirely at low and medium loads for near-silent operation.

Compatibility Checks Before Ordering

Verify that your case accepts a standard ATX form factor power supply and that the unit’s connectors match your motherboard, CPU and graphics card requirements. Confirm the physical dimensions fit your chassis clearance and that the total system power draw stays within the 400 watt rating. Ensure the AC input voltage range suits your local mains supply.

Upgrading from Lower Efficiency or Noisier Units

This supply replaces older bronze, white or unrated units that run hotter, louder and less efficiently at idle. The jump is worthwhile when you want lower electricity use, reduced coil whine and silent fan operation during light workloads. It also suits builds that rely on Modern Standby sleep states which older topologies cannot support properly. Buyers needing more than 400 watts or non-ATX form factors should look elsewhere.