The 3R System L1300 conforms to the ATX form factor and so can accommodate motherboards with form factors ATX and Micro-ATX.
Its dimensions (LxWxH) are 495mm x 220mm x 495mm.
|Form Factor||ATX||Front Fans||1|
|Motherboard Form Factors||Front Fans Size||120mm|
|Material||Not sure||Top Fans||2|
|Color||Black||Top Fans Size||120mm|
|Expansion Slots||7||Rear Fans||1|
|5.25″ Drive Bays||3||Rear Fans Size||120mm|
|3.5″ Drive Bays||7||Bottom Fans||1|
|2.5" Drive Bays||6||Bottom Fans Size||120mm|
|Tool-less Rails||no||IO Display Panel||yes|
|Length||495mm||Front USB 2.0 Slots||2|
|Width||220mm||Front USB 3.0 Slots||2|
|Maximum Graphics Card Length||280mm||Audio IO||yes|
The 3R System L1300 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 495mm x 220mm x 495mm.
The 3R System L1300 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 six 2.5" drive bays.