The maximum theoretical bandwidth of the x16 interface is 8 GB/s in each direction, simultaneously, for a bandwidth of 16 GB/s. • PCI Express 1.x with a raw bit rate of 2.5 GT/s results in an effective bandwidth of 2.0 Gb/s each direction per lane. The maximum theoretical bandwidth of the x16 interface is 4 GB/s in each direction, simultaneously, for a bandwidth of 8 GB/s. For information about Refer to PCI Express technology 1.5 System Memory The board has eight DIMM sockets and supports the fo

58 2.4 Mechanical Considerations ................................................................. 60 2.4.1 Form Factor .......................................................................... 60 2.5 Electrical Considerations .................................................................... 61 2.5.1 Power Supply Considerations .................................................. 61 2.5.2 Fan Header Current Capability ................................................ 62 2.5.3 Add-in Board Consi

• 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 Specific

Front Panel Audio Header for Intel HD Audio Pin Signal Name Description 1 PORT_1L Analog Port 1 – left channel (microphone) 2 GND Ground 3 PORT_1R Analog Port 1 – right channel (microphone) 4 PRESENCE# Active low signal that signals BIOS that an Intel HD Audio dongle is connected to the analog header. PRESENCE#=0 when an Intel HD Audio dongle is connected 5 PORT_2R Analog Port 2 – right channel (headphone) 6 SENSE1_RETURN Jack detection return for front panel (JACK1) 7 SENSE_SEND Jack detection

ACPI technology support . LAN wake capabilities • LAN subsystem software For information about Refer to LAN software and drivers 1.10.1 Intel® 82579L Gigabit Ethernet Controller The Intel 82579L Gigabit Ethernet Controller supports the following features: • 10/100/1000 BASE-T IEEE 802.3 compliant • Energy Efficient Ethernet (EEE) IEEE802.3az support [Low Power Idle (LPI) mode] • Dual interconnect between the Integrated LAN Controller and the Physical Layer (PHY): . PCI Express-based interface fo

CAUTION Ensure that the ambient temperature does not exceed the board’s maximum operating temperature. Failure to do so could cause components to exceed their maximum case temperature and malfunction. For information about the maximum operating temperature, see the environmental specifications in Section 2.8. CAUTION Ensure that proper airflow is maintained in the processor voltage regulator circuit. Failure to do so may result in damage to the voltage regulator circuit. The processor voltage re

USB3 ICC Port2 D. (USB2 Signal D.) 13 GND Ground 14 IntA_P2_SSTX+ USB3 ICC Port2 SuperSpeed Tx+ 15 IntA_P2_SSTX. USB3 ICC Port2 SuperSpeed Tx. 16 GND Ground 17 IntA_P2_SSRX+ USB3 ICC Port2 SuperSpeed Rx+ 18 IntA_P2_SSRX. USB3 ICC Port2 SuperSpeed Rx+ 19 Vbus Power 20 Key No pin Technical Reference Table 22. Chassis Intrusion Header Pin Signal Name 1 Ground 2 Intruder# Table 23. Processor, Front and Rear Chassis, and Auxiliary (4-Pin) Fan Headers Pin Signal Name 1 Ground (Note) 2 +12 V 3 FAN_TACH

Contents 1 Desktop Board Features Supported Operating Systems .............................................................................. 10 Desktop Board