Notice before purchasing the product: By default, only the computer case shell is sold (without case fan and other accessories, please note) 1.Product dimensions:300*270*270mm 2.Support motherboard:MATX /ITX 245*245 170*170 3.PCIe expansion:4 full-height PCIe cards with a maximum length of 220mm 4.Radiator specifications:The height limit for the radiator is 55mm or less 5.Fan specifications:Hard drive bay: 12025 fan positions * 2 Mainboard slot: 12025 fan positions * 2 6.Power Specifications:ATX power supply, with a length limited to 170mm (downward compatible with SFX and FLEX, adapter plate required) 7.Hard drive specifications:8 hot-swappable 3.5-inch hard drive bays / 2x2.5-inch hard drive bays 8.Backplane specifications:SATA backplane *2 Backplane specification Each piece has 2 large 4D connectors 4 SATA connectors