ETH80-B75 computer room motherboard uses a combination of B75 chip and LGA1155-pin CPU; 8 graphics card interfaces are designed with a card slot spacing of 80mm, which can support large graphics card mining, and the motherboard is compatible with computer room standard 4U chassis. The motherboard is suitable for the mining industry with its rich expansion interfaces and other features. (1) Display interface: -compatible (2) USB rear: 2 x USB2.0, 2 x USB3.0 (3) Hard disk interface: 1 x SATA3.0 (4) Hard disk interface: 1 x MSATA (5) Network card interface: 1 x LAN (6) Memory slot: DDR3 (7) CPU socket: LGA1155 (8) Chipset: BGA (B75) (9) BIOS initial restoration: JCMOS (10) Graphics card interface: 8 x PCIE_16X (80mm pitch) (11) Mainboard/graphics card power supply: 6 x POWER_PE (12) Self-initiated call: AUTO_ON Chipset: For B75 Audio chip: N/A Network card chip: 1 x REALIEK 8105E/8106E 100M network card Support maximum memory capacity: 8G Memory description: Support 1066/1333/1600MHz frequency Supported graphics cards: Except 3060 graphics cards are not supported, other graphics cards can be used, such as 1660 2070 3090 RX580!(Support dual fans and the length of the graphics card cannot exceed 26cm, thank you) Please note: the appearance of different batches of products may be different, which will not affect the use colour: black Material: PCB Size: 480mm x 250mm Package Contents: 1 x Motherboard 1 x CPU 1 x CPU Cooling Fan(Different batches, random appearance and color, don't accept the specified appearance and color) 1 x Switch cable (random color, don't accept the specified color) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.