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ASUS P7P55D Premium and P7P55D-E Pro Review

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Closer Look:

Ai Tweaker:

This is the section where you configure the performance settings, voltages, memory sub timings, and more. The Ai Tweaker section of this BIOS is setup so that you have the ability to use some pre-configured utilities like the Ai Overclock Tuner and OC Tuner utility. Under the Ai Overclock tuner, you can use Manual to put your hands on each setting to maximize the performance of these boards, Auto to give you the optimal settings.  DOCP (DRAM OC Profile) overclocks the memory by increasing the bclock and XMP(Extreme Memory Profile) sets the memory based on the XMP profile located on the SPD of the installed modules if they support XMP profiles. CPU Ratio Setting allows you to increase or decrease the bclock multiplier based on what CPU you have installed. Of course, Intel Speedstep technology allows the CPU clock speed to by dynamically controlled by the OS when enabled. Xtreme Phase Full Power Mode allows the most stable voltage supply for the CPU and for overclocking.














The bclock frequency can be adjusted up to 500Mhz, a level that so far is unattainable, but can be set. PCIE frequency can be adjusted upwards to 200MHz and usually has a benefit to a point when pushing the bclock speeds. DRAM Frequency can be set to speeds that correspond to the memory multipliers available with your CPU. QPI frequency can be left at the auto setting or manually adjusted. ASUS/3rd party Utility UI is used to specify whether you want to use ASUS utilities or aftermarket utilities such as SetFSB for overclocking.




OC Tuner Utility starts the TurboV tuning process to give you an overclock with minimal input required. The OC Tuner Limit Value give you 3 preset levels for performance tuning. DRAM timing Control is where you set the memory sub timings for increased performance or stability.



CPU Differential Amplitude and Skew are two settings that can help with increasing the highest bclock setting you are able to get but will take some trial and error on your part as each CPU will need a little something different. Settings for the Amplitude adjustments range from Auto to 700 to 1000mV while the skew settings include auto and a delay of 100 to 1500ps.



Close to the bottom of the page you finally get to the voltages that can help you reach your overclocking goals. CPU Voltage can be adjusted in two ways, with an offset increase over the base voltage or by manually setting the voltage to be applied to the processor. Among the voltages you can tweak in addition to the CPU are the IMC (Integrated Memory Controller), PCH, PLL and DRAM voltages. You can use the DRAM ref voltages to tweak the voltage applied to each DIMM for a higher overclock.





Last but not least, you get Loadline Calibration that will help eliminate vdroop under load. It, however, can lead to overshoot at idle speeds. When disabled, you get voltage characteristics based on Intel's design specifications. CPU and PCIE Spread spectrum can be left to Auto, Enabled, or Disabled.



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