ATX, Micro ATX, mini-ITX, E-ATX and XL-ATX motherboard compatibility4 - 5.25" bays8 - 3.5" HDD trays - all compatible with SSDsA total of 9 expansion slots3 - ModuVent™ plates – two in the top and one in the side7 - Fan positions (3 fans included)Filtered fan slots in front and bottomCPU coolers up to 170 mm tall (when no fan is installed in the side panel)PSU compatibility: ATX PSUs up to 190 mm deep when using the bottom fan location; when not using this fan location longer PSUs (up to 345 mm deep) can be usedGraphics card compatibility: Graphics cards up to 330mm in length with the top HDD cage installed - With the top cage removed, graphics cards up to 480mm in length may be installed26 mm of space for cable routing behind the motherboard plateThick rubber grommets on all holes on the motherboard plate