The **W2SP-213-R2** is a specific part number typically associated with high-performance **PCIe Expansion Riser Cards** or **Server Backplanes**, often found in enterprise hardware environments (such as Inspur or customized server chassis). Below is a breakdown of the electronic components and technical specifications associated with this type of hardware. --- ### ## Technical Overview The W2SP-213-R2 functions as a physical and electrical bridge between a motherboard's PCIe slot and auxiliary components (like GPUs, NVMe drives, or network cards). It is designed to maintain signal integrity over a short distance. ### ### Key Electronic Specifications | Feature | Description | | :--- | :--- | | **Interface Type** | PCIe x16 (Gen 3.0 or Gen 4.0 compatible) | | **Form Factor** | Riser Card / Expansion Board | | **Power Input** | Typically draws from the PCIe slot + 12V/3.3V rails | | **Signal Routing** | Differential pair routing for high-speed data | | **PCB Layers** | High-density multi-layer (usually 6-10 layers) | --- ### ## Critical Electronic Components Based on the R2 (Revision 2) architecture, the following parts are integrated onto the board: 1. **Passive Components (Capacitors/Resistors):** * **MLCCs (Multi-Layer Ceramic Capacitors):** Used for decoupling and filtering noise from the power rails to ensure stable voltage to the peripheral. * **Termination Resistors:** Used for impedance matching to prevent signal reflections on the PCIe differential pairs. 2. **Voltage Regulators / Power Management:** * Often contains small **LDO (Low Dropout) Regulators** or **DC-DC Buck Converters** to step down 12V to the 3.3V or 1.8V required by the logic circuits on the card. 3. **EEPROM / Flash Memory:** * A small serial memory chip (like an I2C 24C series) that stores the **FRU (Field Replaceable Unit)** data, allowing the server BIOS to identify the part number and revision. 4. **Connectors:** * **Gold Fingers:** Hard gold-plated edge connectors for durability and high conductivity. * **PCIe Slot:** A high-retention x16 slot, often reinforced with metal "armor" to support heavy GPUs. --- ### ## Functional Circuitry The "R2" designation implies an engineering revision, usually addressing one of the following electronic improvements: * **Improved EMI Shielding:** Better grounding planes to reduce electromagnetic interference. * **Signal Re-drivers:** Some versions include active chips to "boost" the PCIe signal if the trace length is long, though most passive risers omit these for lower latency. * **Thermal Vias:** Enhanced copper paths to dissipate heat from the power delivery components. --- ### ## Application Use Case This part is predominantly used in **2U Rackmount Servers**. Because 2U servers are too short for full-height cards to stand vertically, the W2SP-213-R2 rotates the card 90 degrees or extends it to a specific bay within the chassis.