TOPOWER TOP-FLEX-300W 300W Flex ATX Power Supply

300 W Flex ATX Power Supply

The Topower Top-Flex-300W delivers 300 W of continuous power in a compact Flex ATX form factor. It targets builders of small-form-factor desktops, HTPCs or industrial chassis that require an ATX-compliant unit shorter than standard PSUs. The 150 mm length fits tight layouts where full-size units cannot. Active PFC and a wide 100-240 V input suit global mains conditions.

Included Connectors and Their Impact

A fixed cable set provides one 20+4-pin main connector, one ATX 4-pin CPU connector, one PCI-E 6-pin graphics connector, three SATA power connectors, two peripheral connectors and one floppy connector. The single 6-pin PCI-E cable supports entry-level discrete graphics cards without adapters. Three SATA plugs handle multiple SSDs or hard drives. Non-modular wiring means every cable remains inside the case, so builders must route unused leads carefully.

Installation Notes and Common Issues

The unit mounts with standard ATX screw holes and measures 150 mm long, 80 mm wide and 40 mm high. A single 40 mm fan uses a push-pull airflow design; verify that the chassis vents align with the fan exhaust to avoid recirculation. Fixed cables add bulk behind the motherboard tray, so check clearance before closing the side panel. The 80 PLUS certified efficiency rating exceeds 80 percent from 20 to 100 percent load, reducing heat output in typical workloads.