The **H55-R** typically refers to a standard Micro-ATX motherboard based on the **Intel H55 Express Chipset**. This board was designed for the LGA 1156 socket, bridging the gap between legacy connectivity and early "Core i" series technology. --- ### 1. Core Component Specifications The electronic architecture of the H55-R is centered around supporting first-generation Intel Core processors. | Component | Specification / Support | | :--- | :--- | | **CPU Socket** | LGA 1156 (Supports Core i7, i5, i3, and Pentium G6950) | | **Chipset** | Intel® H55 Express PCH | | **Memory Slots** | 2x DDR3 DIMM (Dual Channel, up to 1333/1600 MHz) | | **Expansion** | 1x PCIe x16 (Gen 2.0), 1x PCIe x1 | | **Storage** | 4x SATA II (3Gb/s) ports | --- ### 2. Key Electronic Sections #### A. Voltage Regulator Module (VRM) The H55-R usually features a **3+1 or 4-phase power design**. * **MOSFETs:** Manage the switching of current to the CPU. * **Solid Capacitors:** Standard on most "R" (Retail/Refined) variants to ensure longevity and heat resistance compared to electrolytic versions. * **Chokes:** High-permeability ferrite core chokes to reduce EMI and provide stable power. #### B. Integrated Graphics Support Unlike older chipsets, the H55-R does not have a built-in GPU on the motherboard itself. Instead, it features the **Flexible Display Interface (FDI)**, which routes the integrated graphics from the CPU (if available, like in Clarkdale chips) to the rear I/O ports (VGA/HDMI). #### C. Audio and Networking Chips * **Audio:** Typically utilizes the **Realtek ALC series** (e.g., ALC662) for 6-channel High Definition audio. * **LAN:** Usually equipped with a **Realtek RTL8111** series controller providing Gigabit Ethernet (10/100/1000 Mbps). --- ### 3. Rear I/O Connectivity The electronic interface on the back panel generally includes: 1. **PS/2 Ports:** For legacy keyboard and mouse. 2. **Video Out:** 1x VGA and 1x HDMI (or DVI). 3. **USB:** 4x to 6x USB 2.0 ports (Note: Native USB 3.0 is rare on standard H55 boards). 4. **Audio Jacks:** Line-in, Line-out, and Microphone. --- ### 4. Technical Pinout Example (Front Panel) Most H55-R boards follow a standard 9-pin header layout for the power/reset switches: ```text 1[Power LED+] 3[Power SW] 5[Empty] 2[Power LED-] 4[Power SW] 6[HDD LED+] 8[Reset SW] 7[HDD LED-] 9[Reset SW] 10[No Pin] ```