Ruth's sister 250W Pico PSU 12V DC 24-pin internal power cable

Compact Pico PSU for space-constrained builds

This 250W DC-to-DC module plugs directly into a 24-pin ATX socket and accepts 12V input through a 2.5mm x 5.5mm barrel jack. It delivers +3.30V, +5.00V, +5.00VSB, +12.00V and -12V rails at up to 90% working efficiency. The fully modular design uses industrial solid capacitors for stable operation in mini-ITX or 1U chassis.

Requires external 12V adapter

The unit draws a maximum of 21A from a 12V DC source operating between 11.4V and 12.6V, so a compatible brick or regulated supply is mandatory. It provides a 4-pin CPU connector and 24-pin motherboard connector only, with no dedicated GPU power outputs. This frees internal volume by eliminating a standard ATX PSU and its cabling.

Replaces full-size ATX units in silent, low-draw PCs

Builders moving from a conventional power supply to this pico module gain a fanless, noise-free solution for platforms that stay within the 250W limit. The jump is worthwhile when the build has no discrete graphics card and fits a compact case, but it cannot support configurations needing PCIe power connectors or higher total wattage.