The 3R System L900 conforms to the ATX form factor and so can accommodate motherboards with form factors ATX and Micro-ATX.
Its dimensions (LxWxH) are 505mm x 220mm x 458mm.
|Motherboard Form Factors||Maximum Graphics Card Length||280mm|
|Material||Not sure||Front Fans||1|
|Color||Black||Front Fans Size||120mm|
|Expansion Slots||7||Rear Fans||1|
|5.25″ Drive Bays||3||Rear Fans Size||120mm|
|3.5″ Drive Bays||4||IO Display Panel||yes|
|2.5" Drive Bays||0||Front USB 2.0 Slots||4|
|Tool-less Rails||no||Front USB 3.0 Slots||0|
The 3R System L900 has a the ATX form factor. ATX is the most ubiquitous of case standards, providing the largest array of compatible hardware on the market. Using the 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 505mm x 220mm x 458mm.
The 3R System L900 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 a couple of extra free hard drives with the four 3.5" drive bays that are also available. To mount an SSD you would require an adapter, however, as there are no 2.5" drive bays.