MINISFORUM ESP4B-850 PCIe Expansion Card ,4X M.2 2280 NVMe SSD Slots with OCuLink & 20Gbps USB-C,Active Cooling, Low-Profile Adapter for Mini PC, NAS SFF Builds

【Integrated AMD B850 PCH Architecture】Unlike conventional expansion cards based on simple PCIe switching chips, this adapter utilizes the full AMD B850 chipset. It integrates four M.2 NVMe slots, an OCuLink interface, and a high-speed USB-C port into a single PCIe 4.0 x4 slot, offering versatile storage expansion. 【Intelligent Dual-Mode Support for Four M.2 NVMe Slots】 Supports up to four M.2 NVMe SSDs. In "High Performance Mode" (dual-drive), it provides the system drive or cache drive with unrestricted PCIe 4.0 x4 speeds (theoretical bandwidth up to 8 GB/s). In "Full Configuration Mode" (quad-drive), each slot operates at PCIe 4.0 x2 speed for maximum capacity expansion. 【Hybrid OCuLink SATA and 20 Gbps USB-C Expansion】The integrated OCuLink interface allows for the connection of up to four SATA 3.0 drives (HDD/SSD) via adapter cables. Additionally, it features a front-facing USB 3.2 Gen 2x2 USB-C port that supports data transfer rates of up to 20 Gbps and provides 5V/3A power delivery for external devices. 【Active Thermal Management and Energy-Efficient Design】 Equipped with a custom-designed active fan and a phase-change thermal pad to prevent overheating and throttling under full load, the card supports ASPM (Active State Power Management), which intelligently reduces power consumption during idle periods. 【Broad Compatibility with Workstations and NAS】Designed for Intel and AMD platforms, this PCIe 4.0 x4 expansion card is the ideal storage expansion solution for video editing workstations, NAS file servers, and large-scale data backup systems. It simultaneously meets the requirements for high-speed caching and massive storage capacity.