Performance Tuning Guide

Intel DX58SO2/DX58OG Desktop Board Performance Tuning Guide
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3.5.3.4 Decrease QPI Data Rate
The QPI data rate is initially being reduced to help prevent subsequent host clock
changes from increasing the QPI bus speed to where it becomes unstable. The QPI
speed will be increased later in the performance tuning process.
From the Performance menu, scroll down to the Bus submenu and press <Enter>. On
the Bus Overrides screen, scroll down to QPI Data Rate and set the data strap to
4.8 GT/s as shown in Figure 3.6. Note that with some processors, the data strap may
already be locked at 4.8 GT/s.
Figure 3.6. BIOS Screen Showing QPI Data Rate Change Options
3.5.3.5 Increase Core Ratio Limits (Also Referred to as Multipliers
or Turbo Ratios) and/or Host Clock Frequency
NOTE
Only Extreme Edition processors allow modifying the core ratio limits (also referred to
as the multiplier or turbo ratios). Skip this section if you are using a non-Extreme
Edition processor since their multipliers are not adjustable. If you have already
increased the host clock frequency as much as possible, you may not be able to
increase the multipliers without processor stability issues occurring.