The **RSC-R1U-UT** is a 1U Rackmount Server Chassis Riser Card, specifically designed for server motherboards. It is a passive electronic component that allows for the vertical orientation of a PCIe expansion card to fit within the height constraints of a 1U chassis. ### Key Electronic & Technical Specifications | Feature | Specification | | :--- | :--- | | **Form Factor** | 1U Rackmount | | **Interface Type** | PCI Express (PCIe) | | **Lane Configuration** | Typically PCIe x16 (Signal passthrough) | | **Orientation** | Right-Angle / Upright | | **Connector Type** | Gold-finger (Male) to Slot (Female) | | **Power Distribution** | Passthrough via PCIe bus (max 75W) | --- ### Core Components & Their Functions #### 1. Printed Circuit Board (PCB) The "backbone" of the part. It is usually constructed from high-quality **FR-4 material** with multiple layers. The PCB is engineered with impedance control to ensure that high-speed signals (like PCIe 3.0 or 4.0) do not degrade as they travel from the motherboard to the expansion card. #### 2. Gold Fingers (Male Connector) These are the contact points at the bottom of the riser that plug into the motherboard's PCIe slot. They are plated with **hard gold** to prevent oxidation and ensure a low-resistance electrical connection over multiple insertion cycles. #### 3. PCIe Slot (Female Connector) The top-mounted slot where the expansion card (e.g., a Network Interface Card or RAID Controller) is inserted. It includes: * **Plastic Housing:** High-temperature resistant. * **Phosphor Bronze Contacts:** Usually gold-plated for signal integrity. * **Retention Clip:** A mechanical lock to prevent the expansion card from vibrating loose. #### 4. Decoupling Capacitors (SMD) Small Surface Mount Device (SMD) capacitors are often soldered onto the PCB. These act as local energy reservoirs to: * Filter out electrical noise. * Stabilize the voltage (+3.3V and +12V) delivered to the expansion card. --- ### Installation Layout In a 1U server environment, the electronic layout follows this flow: 1. **Motherboard:** Sends PCIe signals horizontally. 2. **RSC-R1U-UT:** Receives the signals through the gold fingers and routes them 90 degrees upward through internal copper traces. 3. **Expansion Card:** Receives the signals while sitting parallel to the motherboard to fit under the 1.75-inch chassis lid. ---