[Motherboard] micro-ATX Motherboard dimension 9.6 * 9.6 ( 24.4 * 24.4 cm). ITX Motherboard dimension 6.7 * 6.7 (17*17cm). ^^ [Power Supply Unit] Flex PSU dimension 3.21 * 1.59 * 5.91 ( 81.5 * 40.5 *150mm). ^^ [Full Height PCI-e Expansion Card] To add video card or network card or more. ^^ [Come With Front USB 3.0 ] USB 3.0 for faster data transfer. ^^ [Come With 4 * 8cm Replaceable Fan] Pre-installed 4 of 80*80*25mm chassis fan.