The Cooler Master K550 conforms to the Micro-ATX form factor and so can accommodate motherboards with form factors ATX and Micro-ATX.
Its dimensions (LxWxH) are 504mm x 212mm x 550mm.
|Form Factor||Micro-ATX||Front Fans Size||120mm|
|Motherboard Form Factors||Top Fans||1|
|Material||Not sure||Top Fans Size||120mm|
|Expansion Slots||7||Side Fans Size||120mm|
|5.25″ Drive Bays||3||Rear Fans||1|
|3.5″ Drive Bays||7||Rear Fans Size||120mm|
|2.5" Drive Bays||2||Bottom Fans||1|
|Tool-less Rails||no||Bottom Fans Size||120mm|
|Length||504mm||IO Display Panel||yes|
|Width||212mm||Front USB 2.0 Slots||2|
|Height||550mm||Front USB 3.0 Slots||1|
|Maximum Graphics Card Length||400mm||eSATA||yes|
|Maximum CPU Cooler Size||157mm||Audio IO||yes|
The Cooler Master K550 has a the Micro-ATX form factor. Micro-ATX is a smaller version of the ATX standard which is designed to make your case and the system therein lightweight and portable. Using the Micro-ATX standard, the case can house motherboards and power supplies with form factors ATX and Micro-ATX. The dimensions of the case itself (LxWxH) are 504mm x 212mm x 550mm.
The Cooler Master K550 has seven expansion slots, so there is plenty of room for extra components, which may be a deciding factor when planning on the longevity and build type of a PC system. The case has three 5.25" drive bays, which is enough to house an optical drive and a couple of hard drives, while still having space for plenty more HDDs with the seven 3.5" drive bays that are also available. You can even install an SSD or laptop-sized HDD using one of the two 2.5" drive bays.