Feature: 1.Multi-functional Mainboard: This motherboard features an M-ATX form factor, measuring 242x180mm, making it suitable for installation in small desktops and servers. With its PCI-E 16x slot, M.2 NVME interface, M.2 WIFI interface, and PCI-E 4X expansion interface, this motherboard is capable of supporting high-performance graphics cards, solid-state hard drives, and other devices, providing versatile solutions for different needs. 2.Processor and Memory Support: This PC main board uses an LGA2011 socket, supporting processors with LGA2011 V3/V4 pins, such as E5-2690V3, providing outstanding performance and multi-threaded processing capabilities, suitable for high-performance computing and server applications. With its dual DDR4 memory slots supporting up to 64GB capacity and supporting both desktop and ECC memory, it provides strong support for system memory, ensuring smooth and seamless operation. 3.Networking and Storage: This desktops mainboard comes equipped with a gigabit Ethernet adapter, offering stable and high-speed wired network connectivity. With its four SATA 3.0 ports, this motherboard can connect multiple hard drives and solid-state drives, providing ample storage space for your data and applications. 4.Power and USB Interfaces: This desktop computer motherboard provides one 8-pin 24-pin power interface, ensuring stable and reliable power supply. Its rich selection of USB interfaces includes six USB 3.0 ports and six USB 2.0 ports, as well as two front-panel USB 3.0 and two front-panel USB 2.0 ports, making it easy to connect a of external devices. 5.Rich Expandability and Stable Hardware Design: This computer mainboard is highly versatile and suitable for both high-performance desktop and server applications, providing reliable performance and strong functionality. Specification: Application:Desktop Motherboard model: X99-D4 Motherboard Version: M-ATX Motherboard size: About 242x180mm/9.52x7.08in Graphics card slot: 1 x PCI-E 16x Network card: Gigabit adaptive network card Expansion interface: 1 x M.2NVME, 1 x M.2WIFI, 1 x PCI-E 4X CPU socket: support LGA2011 V3/V4 Memory slot: 2 x DDR4 desktop/ECC memory Memory capacity: 64GB SATA interface: 4 x SATA3.0 Power interface: 1 x 8 pin+1 x 24 pin USB interface: 6 x USB3.0, 6 x USB2.0 (front 2 x USB3.0, 2 x USB2.0) Color: Black Material: plastic Package Contents: 1 x Laptop Motherboard Only the above package content, other products are not included. Note: Light reflection 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.