The inside of the BUC 101 follows In Win’s standard black/lime green color scheme. Everything is black, except for the tool-free devices, which are lime-green. Towards the front of the case you’ll find four 5.25” slots (3 external, 1 internal) and one external 3.5” slot all of which use the pin tool-free device.
Moving further down the front of the case are five 3.5”/2.5” drive bays with lime-green drive trays.
What’s unique about this case is that while it does have cable routing holes, some of the cables are pre-routed and covered by a half-pipe for a short distance.
Towards the rear of the case is the bottom mounted power supply hole with raised rails to keep airflow underneath the PSU. Moving up are the seven expansion slots with lime-green tool-free installation devices and slotted covers for optimal airflow. Near the top of the case is your rear and top 120mm exhaust fans, motherboard I/O slot, and CPU cooler cutout.
The backside of the motherboard tray gives you just enough room to manage some of your cables. While it’s not the largest space we’ve seen, it’s certainly not the smallest.