In Win BL631.FF300TB3F Micro ATX Slim PC case

Micro ATX Slim Case with 300W PSU

The In Win BL631.FF300TB3F is a compact steel chassis that accepts Micro ATX and Mini ITX motherboards. It includes a pre-installed 300W TFX power supply mounted at the bottom, making it suited for space-constrained office or home builds that need a ready-to-use enclosure.

Thermals, Noise and Power Draw

A single 80mm rear fan provides the only active airflow path through the slim interior. The 300W supply limits total system power, so the case runs quietly with low-TDP processors and integrated graphics but cannot sustain high-wattage components under load.

Replaces Larger Towers for Basic Builds

This case replaces full-size ATX towers when desk space is tight and expansion needs are modest, offering one 5.25in bay, one external 3.5in bay, two internal 3.5in bays, one 2.5in bay and two hot-swap bays. The jump is worthwhile for builders who need four expansion slots and front USB 2.0, USB 3.0 and audio ports in a 13.6in tall footprint.