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Instructions Intel, Modèle Intel® Desktop Board DX79SR

Fabricant : Intel
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• Single channel (Asymmetric) mode. This mode is equivalent to single channel bandwidth operation for real world applications. This mode is used when only a single DIMM is installed or the memory capacities are unequal. Technology and device width can vary from one channel to the other. If different speed DIMMs are used between channels, the slowest memory timing will be used. For information about… Refer to: Memory Configuration Examples htm Intel Desktop Board DX79SR Technical Product Specification Figure 3 illustrates the memory channel and DIMM configuration. Figure 3. Memory Channel and DIMM Configuration NOTE For best memory performance always install memory into the blue DIMM memory sockets if installing four DIMMs or less in your configuration. Product Description 1.6 Intel® X79 Express Chipset The Intel X79 Express Chipset consisting of the Intel X79 Platform Controller Hub (PCH) provides interfaces to the processor and the USB, SATA, LAN, PCI, and PCI Express interfaces. The PCH is a centralized controller for the board’s I/O paths. For information about Refer to The Intel X79 Express Chipset Resources used by the chipset Chapter 2 1.6.1 USB The board supports up to 14 USB 2.0 ports and six USB 3.0 ports. The Intel X79 Express Chipset provides the USB controller for the 2.0 ports. The six USB 3.0 ports are provided by two NEC* UPD720200 controllers. The port arrangement is as follows: • Four USB 3.0 ports are implemented with stacked back panel connectors (blue) • Two USB 3.0 front panel ports implemented through one internal connector (blue) • Six USB 2.0 ports are implemented with stacked back panel connectors (black) • Eight USB 2.0 front panel ports implemented through four internal headers All 20 USB ports are high-speed, full-speed, and low-speed capable. The USB 3.0 ports are super-speed capable. NOTE Computer systems that have an unshielded cable attached to a USB port may not meet FCC Class B requirements, even if no device is attached to the cable. Use a shielded cable that meets the requirements for full-speed devices. For information about Refer to The location of the USB connectors on the back panel Figure 11, page 46 The location of the front panel USB headers Figure 13, page 48 Intel Desktop Board DX79SR Technical Product Specification 1.6.2 SATA Interfaces The board provides eight SATA connectors which support one device per connector: • Two internal SATA 6.0 Gb/s connectors through the PCH (blue) • Two internal SATA 6.0 Gb/s connectors through a Marvell 88SE9128 controller (gray) • Four internal SATA 3.0 Gb/s connectors through the PCH (black) The PCH provides independent SATA ports with a theoretical maximum transfer rate of 6.0 Gb/s for four ports and 3.0 Gb/s for four ports. A point-to-point interface is used for host to device connections. The underlying SATA functionality is transparent to the operating system. The SATA controller can operate in both legacy and native modes. In legacy mode, standard IDE I/O and IRQ resources are assigned (IRQ 14 and 15). In Native mode, standard PCI Conventional bus resource steering is used. Native mode is the preferred mode for configurations using the Microsoft Windows* XP, Windows Vista*, and Windows 7 operating systems. NOTE Many SATA drives use new low-voltage power connectors and require adapters or power supplies equipped with low-voltage power connectors. For more information, see: For information about Refer to The location of the SATA connectors Figure 13, page 48 1.6.2.1 SATA RAID The board supports the following RAID (Redundant Array of Independent Drives) levels via the PCH: • RAID 0 -data striping • RAID 1 -data mirroring • RAID 0+1 (or RAID 10) -data striping and mirroring • RAID 5 -distributed parity NOTE In order to use supported RAID features, you must first enable RAID in the BIOS. Also, during Microsoft Windows XP installation, you must press F6 to install the RAID drivers. See your Microsoft Windows XP documentation for more information about installing drivers during installation. Both Microsoft Windows Vista and Microsoft Windows 7 include the necessary RAID drivers for both AHCI and RAID without the need to install separate RAID drivers using the F6 switch in the operating system installation process. Product Description 1.7 Real-Time Clock Subsystem A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When the computer is not plugged into a wall socket, the battery has an estimated life of three years. When the computer is plugged in, the standby current from the power supply extends the life of the battery. The clock is accurate to ± 13 minutes/year at 25 .C with 3.3 VSB applied via the power supply 5V STBY rail. NOTE If the battery and AC power fail, date and time values will be reset and the user will be notified during POST. When the voltage drops b...


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