KHACHIMO SPI250F4BBB 1U 250W ATX power supply

1U 250W ATX power supply

The KHACHIMO SPI250F4BBB is a 1U form-factor ATX power supply rated at 250W, built for compact servers and slim workstations where rack height is restricted. It targets system integrators who need reliable power in a single rack unit without sacrificing efficiency.

Practical limits of 250W ATX in 1U

A 250W ceiling restricts the unit to low-power CPUs, integrated graphics or entry-level discrete cards; high-core-count processors and multi-GPU configurations will exceed the available headroom. The 80 PLUS Gold rating guarantees high efficiency at typical loads, reducing waste heat that a 1U chassis must dissipate. Modern Standby support enables rapid wake-from-sleep transitions, but only on platforms that implement the corresponding low-power states.

Installation notes

The 1U height fits standard rack rails, yet cable routing can be tight because the short depth leaves little room for stiff ATX and EPS connectors behind the motherboard tray. Zero RPM fan mode eliminates noise at low and medium loads, though the fan will spin under sustained heavy draw — ensure front-to-rear airflow is unobstructed. Resonant LLC topology with DC-to-DC conversion minimises coil whine, but verify that the motherboard's pin-out matches the supply's fixed cables before closing the chassis.