Memory DQ Drive Strength
Common Options : Not Reduced, Reduced 15%, Reduced 30%, Reduced 50%
This BIOS feature allows you to reduce the drive strength for the memory DQ (data) pins. It does not allow you to increase the drive strength because it has already been set to use the maximum drive strength by default.
When set to Not Reduced, the DQ drive strength will remain at full strength.
When set to Reduced 15%, the DQ drive strength will be reduced by approximately 15%.
When set to Reduced 30%, the DQ drive strength will be reduced by approximately 30%.
When set to Reduced 50%, the DQ drive strength will be reduced by approximately 50%.
Generally, you should keep the DQ driver at full strength if you have multiple memory modules. The greater the DRAM load, the more DQ drive strength you need. But no matter how many modules you use, AMD recommends that you set this BIOS feature to Not Reduced if you are using a CG or D revision Athlon 64 or Opteron processor.
However, if you are only using a single memory module, you can reduce the DQ drive strength to improve signal quality and possibly achieve higher memory clock speeds. If you hit a snag in overclocking your memory modules, you can also try reducing the DQ drive strength to achieve higher clock speeds, even if you are using multiple memory modules.
AMD recommends that you reduce the DQ drive strength for Revision E Athlon 64 and Opteron processors. For example, the DQ drive strength should be reduced by 50% if you are using a Revision E Athlon 64 or Opteron processor with memory modules based on the Samsung 512Mbits TCCD SDRAM chip.
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