Figure 2. Block Diagram Intel Desktop Board DZ68DB Technical Product Specification 1.2 Legacy Considerations This board differs from other Intel Desktop Board products, with specific changes including (but not limited to) the following: • No parallel port connector • No floppy drive connector • No serial port connector or header • No PS/2 connectors • No PATA connector 1.3 Online Support To find information about… Visit this World Wide Web site: Intel Desktop Board DZ68DB Desktop Board Support Available configurations for Intel Desktop Board DZ68DB Supported processors Chipset information BIOS and driver updates Tested memory 025414.htm Integration information Product Description 1.4 Processor The board is designed to support the Intel Core i7, Intel Core i5, and Intel Core i3 processors in an LGA1155 socket Other processors may be supported in the future. This board is designed to support processors with a maximum wattage of 95 W Thermal Design Power (TDP). The processors listed above are only supported when falling within the wattage requirements of Intel Desktop Board DZ68DB. See the Intel web site listed below for the most up-to-date list of supported processors. For information about… Refer to: Supported processors CAUTION Use only the processors listed on the web site above. Use of unsupported processors can damage the board, the processor, and the power supply. NOTE This board has specific requirements for providing power to the processor. Refer to Section 2.5.1 on page 55 for information on power supply requirements for this board. 1.4.1 PCI Express x16 Graphics The Intel Core i7, Intel Core i5, and Intel Core i3 processors in an LGA1155 socket support discrete add in graphics cards via the PCI Express 2.0 x16 graphics connector: • Supports PCI Express GEN2 frequency of 2.5 GHz resulting in 5.0 Gb/s each direction (500 MB/s) per lane. The maximum theoretical bandwidth on the interface is 8 GB/s in each direction, simultaneously, for an aggregate of 16 GB/s when operating in x16 GEN2 mode. • Supports PCI Express GEN1 frequency of 1.25 GHz resulting in 2.5 Gb/s each direction (250 MB/s) per lane. The maximum theoretical bandwidth on the interface is 4 GB/s in each direction, simultaneously, for an aggregate of 8 GB/s when operating in x16 GEN1 mode. Intel Desktop Board DZ68DB Technical Product Specification 1.5 System Memory The board has four DIMM sockets and supports the following memory features: • 1.5 V DDR3 SDRAM DIMMs with gold plated contacts, with the option to raise the voltage to support higher performance DDR3 SDRAM DIMMs. • Support for 1.35V Low Voltage DDR3 (new JEDEC specification) • Two independent memory channels with interleaved mode support • Unbuffered, single-sided or double-sided DIMMs with the following restriction: Double-sided DIMMs with x16 organization are not supported. • 32 GB maximum total system memory (with 4 Gb memory technology). Refer to Section 2.1.1 on page 39 for information on the total amount of addressable memory. • Minimum recommended total system memory: 512 MB • Non-ECC DIMMs • Serial Presence Detect • DDR3 1333 MHz and DDR3 1066 MHz SDRAM DIMMs NOTE To be fully compliant with all applicable DDR SDRAM memory specifications, the board should be populated with DIMMs that support the Serial Presence Detect (SPD) data structure. This allows the BIOS to read the SPD data and program the chipset to accurately configure memory settings for optimum performance. If non-SPD memory is installed, the BIOS will attempt to correctly configure the memory settings, but performance and reliability may be impacted or the DIMMs may not function under the determined frequency. Table 3 lists the supported DIMM configurations. Table 3. Supported Memory Configurations DIMM Capacity Configuration (Note) SDRAM Density SDRAM Organization Front-side/Back-side Number of SDRAM Devices 512 MB SS 1 Gbit 64 M x16/empty 4 1024 MB SS 1 Gbit 128 M x8/empty 8 1024 MB SS 2 Gbit 128 M x16/empty 4 2048 MB DS 1 Gbit 128 M x8/128 M x8 16 2048 MB SS 2 Gbit 128 M x16/empty 8 4096 MB DS 2 Gbit 256 M x8/256 M x8 16 4096 MB SS 4 Gbit 512 M x8/empty 8 8192 MB DS 4 Gbit 512 M x8/512 M x8 16 Note: “DS” refers to double-sided memory modules (containing two rows of SDRAM) and “SS” refers to single-sided memory modules (containing one row of SDRAM). For information about… Refer to: Tested Memory /CS-025414.htm Product Description 1.5.1 Memory Configurations The Intel Core i7, Intel Core i5, and Intel Core i3 processors in the LGA1155 socket support the following types of memory organiza...