Computer Open Case Rack Support X79 X99 Dual Servers Mainboard DIY Computer Open Chassis for ATX M ATX ITX Motherboard1Sturdy Structure: Thickening of the bottom board and rear board, increase the optimization of folding edges, increase the structural strength by 200 percent, sturdy and durable. 2Firm Fixing: Computer open case rack with triangular reinforced fixing plate, more stable and firm assembly. Stable and reliable, can be used for a long time. 3Wide Compatibility: This computer open chassis rack supports all ATX, M ATX, ITX motherboards, 1 SSD, 1 HDD, standard or extended ATX power supply. 4Support For Graphics Cards: The number of graphics cards supported depends on the motherboard's PCIE card slot and the thickness of the card, generally 3 to 7 sheets. 5Cable Routing Hole Design: This computer motherboard case shelf with cable routing holes, support for back panel cable routing, making the whole machine more tidy.