### ASUS WS X299 PRO Workstation Motherboard (Used)Professional workstation-grade ATX motherboard based on Intel X299 chipset, designed for LGA2066 Intel Core X-series processors. Features 8-channel DDR4 memory support, dual M.2 NVMe, abundant PCIe expansion and dual Gigabit LAN, ideal for content creation, engineering calculation, multi-GPU computing and 24/7 stable operation.#### Core Specifications- Socket: LGA 2066 (for Intel Core X-series processors only)- Chipset: Intel X299- Memory: 8 x DDR4 DIMM slots, max 256GB, supports DDR4 4133(O.C.) / 3600(O.C.) / 2933 / 2666 MHz, XMP support- Storage: 2 x M.2 NVMe (32Gbps), 6 x SATA 6Gb/s, 1 x U.2- Expansion: 7 x PCIe 3.0 slots, supports multi-GPU and expansion cards- Network: 2 x Intel Gigabit LAN ports- USB: USB 3.1 Gen2 (Type-A + Type-C), USB 3.1 Gen1, USB 2.0- Audio: 7.1 Channel HD Audio with DTS support- Form Factor: ATX (30.5 x 24.4 cm)#### Core Advantages- Workstation-grade design and components, excellent stability for 24/7 continuous operation- Abundant PCIe expansion slots, perfect for multi-GPU computing, capture cards and expansion cards- 8-channel DDR4 memory with high capacity, ideal for large file processing and virtualization- Dual M.2 NVMe + U.2 + 6 SATA, full storage expansion capability- Dual Intel Gigabit LAN, stable network performance for workstation use- ASUS Fan Xpert 4 cooling control, supports water cooling and fan management- BIOS FlashBack function, easy to update BIOS without CPU#### Compatibility Notes- **ONLY compatible with LGA 2066 Intel Core X-series processors** (i9/i7/i5 X-series)- NOT compatible with LGA 2011-3 X99 motherboards / Xeon E5 V3/V4 processors- 4-core CPUs only support 4 memory slots; 6+ core CPUs support all 8 slots- Standard ATX form factor, please confirm your case size before purchase- CPU and memory are NOT included, only motherboard + I/O shield + mounting screws#### Testing Statement✅ Boots normally and enters BIOS smoothly✅ All 8 memory slots tested and working✅ All PCIe slots, M.2 slots and SATA ports functional✅ All USB ports, LAN ports and audio work properly✅ No bent CPU pins, no physical damage, no repair history✅ BIOS updated to latest stable version✅ Includes I/O shield and all mounting screws
