A internal shot of the X-QPack from above shows that there's plenty of room to stock this case with hardware.
Once you remove the three-sided case cover, you'll find the case interior has been designed for MicroATX hardware. Aspire's own 420- Watt power supply comes built-in, along with a 120 mm system fan. Both drive cages, one for 5.25" drives, the other for 3.5" units, are easy to remove to for drive installation. The same goes for the slide-out system tray, which accommodates the motherboard (plus RAM, CPU, its cooler and expansion cards).
Side views of the empty case
Slide-out tray for system hardware