The SG13 features an ATX-compatible power supply mount and can fit ATX power supplies up to 150mm long, which provides clearance for CPU coolers up to 61mm tall. Optionally, builders can choose an SFX power supply if used with the separately-available SilverStone PP08B ATX-to-SFX adapter. This will provide an additional 21mm of space inside the chassis, thereby allowing the use of CPU coolers up to 82mm tall. The SG13 also gives builders options when it comes to storage. It can fit one 3. 5″ drive and one 2. 5″ drive, or alternatively three 2. 5″ drives. Finally, builders have the choice of running the SG13 without active cooling, adding a 120mm/140mm fan to the front panel, or adding a 120mm/140mm CPU cooler to the front panel. Note that 140mm products will reduce space available for video cards, so for example a 25mm-thick 140mm-class fan will take up approximately 1″ of the 10. 5″ video card space, leaving 9. 5″ for a video card.