This is a beast of a case - It's HUGE! As a full tower case, it sports 13 drive bays 1 x 3.5" floppy drive (at the top of the case - make sure you've got a long enough lead!) 5 x 5.25" drive bays (suitable for CD Roms etc) - all of these are externally accessible 7 x 3.5" internal drive bays (suitable for hard drives) 2 removable cages for 3.5" drives Removable motherboard tray (This alone makes life so much easier - I couldn't go back to using a case without one!) This case also has space at the top (above the power supply) for a further two fans (80mm), along with space for a pair of 60mm fans on the removable motherboard tray. There is also space at the bottom (front) of the case for a further 80mm fan The power supply is a standard 300 Watt ATX unit which kicks out enough power to run my system happily (in my case I have only 4 free drive bays, no spare slots on my motherboard (6 PCI & 1 AGP), and a power-hungry GeForce 256 card). NB since writing this review, I have found that this supply was at its limit coping with the above! Adding a 3rd Dimm to my memory left the system unable to boot reliably. If you are going to fill this case think about upgrading to a beefier supply! The build quality of this case is superb, and despite the overall cost, I will be using more of these cases in the future (Now up to my 3rd - but as the cases are so easy to work on, I don't see the point in using a lower quality case).