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Figure 1. Intel Desktop Board D425KT Components Intel Desktop Board D425KT Product Guide Table 2. Intel Desktop Board D425KT Components Label Description A Back panel connectors B Serial header (COM1) C Chassis fan header D 12 V processor core voltage connector (2 x 2 pin) E Processor F Main power connector (2 x 12 pin) G SO-DIMM 0 slot H SO-DIMM 1 slot I Battery J SATA 1 K SATA 0 L USB front panel header M Front panel header N Standby power indicator O BIOS configuration jumper block P Intel NM10 Express Chipset Q USB front panel header R PCI bus connector S Front panel audio header Desktop Board Features Processor Intel Desktop Board D425KT includes a passively-cooled, single-core Intel Atom processor with integrated graphics and memory controller. The processor is soldered to the Desktop Board and is not customer upgradeable. NOTE The board is designed to be passively cooled in a properly ventilated chassis. Chassis venting locations are recommended above the processor heatsink area for maximum heat dissipation effectiveness. System Memory NOTE To be fully compliant with all applicable Intel® SDRAM memory specifications, the board should be populated with DIMMs that support the Serial Presence Detect (SPD) data structure. If your memory modules do not support SPD, you will see a notification to this effect on the screen at power up. The BIOS will attempt to configure the memory controller for normal operation. The Desktop Board has two 204-pin DDR3 SO-DIMM sockets with gold-plated contacts. These sockets support: • Support for DDR3 800/1066/1333 MHz SO-DIMMs (DDR3 1066 MHz and DDR3 1333 MHz SO-DIMMs operate at 800 MHz only) • Serial Presence Detect (SPD) memory only • Non-ECC memory • Up to 4 GB of memory Intel Desktop Board D425KT Product Guide Integrated Graphics Subsystem The integrated Intel GMA 3150 graphics controller features the following: • 400 MHz core frequency • High quality texture engine . DX9.0c* and OpenGL* 1.4 compliant . Hardware Pixel Shader 2.0 . Vertex Shader Model 2.0 • 3D Graphics Rendering enhancements . 1.6 dual texture GigaPixel/s max fill rate . 16-bit and 32-bit color . Vertex cache • Video . Software DVD at 30 fps full screen . DVMT support up to 256 MB • Supports analog displays up to 2048 x 1536 at 75 Hz refresh (QXGA) Intel® NM10 Express Chipset The Intel NM10 Express Chipset is a centralized controller for the board’s I/O paths. For more information about the Intel NM10 Express Chipset, go to Operating System Support The following Microsoft* operating systems are fully supported by the Desktop Board: • Microsoft Windows Vista* Basic Service Pack 1 • Microsoft Windows* XP Home Service Pack 3 • Microsoft Windows* 7 Home Basic and Starter Onboard Audio Subsystem The Intel Desktop Board D425KT 4-channel onboard audio subsystem supports both Intel HD Audio and AC ’97 Audio. The subsystem is based on the following components: • Intel NM10 Express Chipset • RealTek ALC662 audio codec The subsystem includes the following headers and connectors: • Front panel audio header (supports both Intel HD Audio and AC ’97), including functionality for: . Line out (headphones/speaker) . Microphone in • Three back panel analog audio jacks Desktop Board Features The front/back panel audio connectors are configurable through the audio device drivers. Table 3 lists the supported functions of the front panel and back panel jacks. Table 3. Audio Jack Support Audio Jack Line In Line/ Front Out Rear Out Microphone Headphones Front panel – Green No Yes No No Yes Front panel – Pink No No No Yes No Back panel – Blue Yes No Yes No No Back panel – Green No Yes No No Yes Back panel – Pink No No No Yes No Figure 2 shows the default assignment of the back panel audio connectors. Item Description A Line In B Line Out C Mic In Figure 2. Back Panel Audio Connectors NOTE The back panel audio line out connector is designed to power headphones or amplified speakers only. Poor audio quality occurs if passive (non-amplified) speakers are connected to this output. Legacy Input/Output (I/O) Controller The legacy I/O controller provides the following: • Two serial ports (one via a back panel connector and one via an onboard header) • One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port (EPP) support via a back panel connector • Serial IRQ interface compatible with serialized IRQ support for PCI systems • PS/2-style keyboard and mouse ports • Intelligent power management, including a programmable wake up event interface • PCI power management support The BIOS Setup program provides configuration options for the legacy I/O controller. Intel Desktop Board D425KT Product Guide LAN Subsystem The LAN subsystem consists of the following: • Intel NM10 Express Chipset • Realtek 8105E Ethernet Controller for 10/100 Mbits/s Ethernet LAN connectivity • RJ-45 LAN connector with integrated status LEDs Additional features of the LAN...