Intel DZ77GA-70K Technical Product Specification - Page 21

System Memory

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Product Description • PCI Express 1.x with a raw bit rate of 2.5 GT/s results in an effective bandwidth of 250 MB/s each direction per lane. The maximum theoretical bandwidth of the x16 interface is 4 GB/s in each direction, simultaneously, for a total bandwidth of 8 GB/s. For information about PCI Express technology Refer to http://www.pcisig.com 1.4 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. • 1.35 V Low Voltage DDR3 DIMMs (JEDEC specification) • 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 (using 4 Gb memory technology). Refer to Section 2.1.1 on page 49 for information on the total amount of addressable memory. • Minimum total system memory: 1 GB using 512 MB x16 module • Non-ECC DIMMs • Serial Presence Detect • Support for DDR3 1066 MHz to +2400 MHz DIMMs Note: DDR3 1600 MHz DIMMs are only supported by 3rd generation Intel Core processor family processors • XMP version 1.3 performance profile support for memory speeds above 1600 MHz 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. CAUTION 1.5 V is the recommended and default setting for DDR3 memory voltage. The other memory voltage settings in the BIOS Setup program are provided for performance tuning purposes only. Altering the memory voltage may (i) reduce system stability and the useful life of the system, memory, and processor; (ii) cause the processor and other system components to fail; (iii) cause reductions in system performance; (iv) cause additional heat or other damage; and (v) affect system data integrity. 21

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Product Description
21
•
PCI Express 1.x with a raw bit rate of 2.5 GT/s results in an effective bandwidth of
250 MB/s each direction per lane.
The maximum theoretical bandwidth of the x16
interface is 4 GB/s in each direction, simultaneously, for a total bandwidth of
8 GB/s.
For information about
Refer to
PCI Express technology
1.4
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.
•
1.35 V Low Voltage DDR3 DIMMs (JEDEC specification)
•
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 (using 4 Gb memory technology).
Refer to
Section 2.1.1 on page 49 for information on the total amount of addressable
memory.
•
Minimum total system memory:
1 GB using 512 MB x16 module
•
Non-ECC DIMMs
•
Serial Presence Detect
•
Support for DDR3 1066 MHz to +2400 MHz DIMMs
Note: DDR3 1600 MHz DIMMs are only supported by 3
rd
generation Intel Core
processor family processors
•
XMP version 1.3 performance profile support for memory speeds above 1600 MHz
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.
CAUTION
1.5 V is the recommended and default setting for DDR3 memory voltage. The other
memory voltage settings in the BIOS Setup program are provided for performance
tuning purposes only. Altering the memory voltage may (i) reduce system stability
and the useful life of the system, memory, and processor; (ii) cause the processor and
other system components to fail; (iii) cause reductions in system performance; (iv)
cause additional heat or other damage; and (v) affect system data integrity.