KHACHIMO HK400-92FP 300W 1U Flex ATX Power Supply

1U Flex ATX 300 W supply for compact builds

This 1U Flex ATX unit delivers 300 W of continuous power in a form factor designed for slim enclosures such as POS terminals, NAS appliances and ATM chassis. It targets system integrators and hobbyists who need a short-depth PSU that fits restrictive 1U cavities without sacrificing ATX connector compatibility.

Sustained-load efficiency and acoustic profile

The 80 PLUS Gold certification means the supply maintains high efficiency across typical workloads, reducing waste heat and keeping internal temperatures lower during extended operation. Resonant LLC topology with DC-to-DC conversion provides clean, stable rails under constant demand, while the zero-RPM fan mode stops the 92 mm fan completely at low and medium loads for near-silent running.

Installation constraints and common pitfalls

The 1U height and flexible ATX dimensions allow the unit to slide into shallow bays where standard PSUs will not fit, but cable routing must be planned carefully because the short chassis leaves little room for bulky harnesses. Builders should verify that their motherboard and peripheral connectors match the supplied cable set before ordering, as proprietary pin-outs in some OEM chassis can prevent a direct swap.