Asus Z170-PRO User Guide - Page 61
BCLK Frequency: DRAM Frequency Ratio [Auto], OC Tuner [Keep Current Settings]
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4-Core Ratio Limit [Auto] Select [Auto] to apply the CPU default Turbo Ratio setting or manually assign a 4-Core Limit value that must be higher than or equal to the 3-Core Ratio Limit. If you assign a value for 4-Core Ratio Limit, do not set the 1-Core Ratio Limit, 2-Core Ratio Limit, and 3-Core Ratio to [Auto]. 2.5.4 BCLK Frequency: DRAM Frequency Ratio [Auto] Allows you to set the CPU bus speed to DRAM speed ratio mode. [Auto] DRAM speed is set to the optimized settings. [100:133] The BCLK frequency to DRAM speed ratio is set to 100:133. [100:100] The BCLK frequency to DRAM speed ratio is set to 100:100. 2.5.5 DRAM Odd Ratio Mode [Enabled] Enable the odd ratio mode for better granularity. Configuration options: [Disabled] [Enabled] 2.5.6 DRAM Frequency [Auto] This item allows you to set the memory operating frequency. The configurable options vary with the BCLK (base clock) frequency setting. Select the auto mode to apply the optimized setting. Configuration options: [DDR4-800MHz] [DDR4-933MHz] [DDR4-1066MHz] [DDR41200MHz] [DDR4-1333MHz] [DDR4-1400MHz] ~ [DDR4-4133MHz] [DDR4-4266MHz] Selecting a very high memory frequency may cause the system to become unstable! If this happens, revert to the default setting. 2.5.7 OC Tuner [Keep Current Settings] This item allows you to automatically overclock the CPU and DRAM frequencies and voltage for an enhanced system performance. It also accelerates the CPU graphics performance to the extreme depending on the CPU graphics loading. Configuration options: [Keep Current Settings] [Ratio Tuning] [BCLK + Ratio Tuning] Ensure that you installed an efficient CPU fan for CPU and graphics loading before selecting either [BCLK + Ratio Tuning] or [Ratio Tuning]. To keep the current overclocking tuner status, select [Keep Current Settings]. 2.5.8 EPU Power Saving Mode [Disabled] ASUS EPU (Energy Processing Unit) sets the CPU in its minimum power consumption settings. Enable this item to set lower CPU VCCIN and Vcore voltages and achieve the best energy saving condition. Configuration options: [Disabled] [Enabled] 2.5.9 CPU SVID Support [Auto] Disable this item to stop the processor from communicating with the external voltage regulator. Configuration options: [Auto] [Disabled] [Enabled] ASUS Z170 PRO GAMING 2-21