User’s Manual

ROG STRIX Z390-F GAMING BIOS Manual

BCLK Frequency : DRAM Frequency Ratio [Auto]

[Auto] The BCLK frequency to DRAM frequency ratio will be set to the optimized

setting.

[100:133] The BCLK frequency to DRAM frequency ratio will be set to 100:133.

[100:100] The BCLK frequency to DRAM frequency ratio will be set to 100:100.

DRAM Odd Ratio Mode

This item allows you to enable or disable availability of odd DRAM ratios for improved

granularity.

Conguration options: [Enabled] [Disabled]

DRAM Frequency

This item allows you to set the memory operating frequency. The congurable options vary

with the BCLK (base clock) frequency setting. Select the auto mode to apply the optimized

setting.

Conguration options: [Auto] [DDR4-800MHz] - [DDR4-8533MHz]

Load CPU 5G OC Profile

This 5G OC Prole allows you to easily overclock the Intel 8th gen Core processors (K-series

only) to 5GHZ.

Overclockability may vary by processors and does not guarantee stability.

CPU SVID Support [Auto]

Disable this item to stop the CPU from communicating with the external voltage regulator.

Conguration options: [Auto] [Disabled] [Enabled]

DRAM Timing Control

The sub-items in this menu allow you to set the DRAM timing control features. Use the

<+> and <-> keys to adjust the value. To restore the default setting, type [Auto] using the

keyboard and press the <Enter> key.

Changing the values in this menu may cause the system to become unstable! If this

happens, revert to the default settings.

Primary Timings

DRAM CAS# Latency

Conguration options: [Auto] [1] – [31]

DRAM RAS# to CAS# Delay

Conguration options: [Auto] [1] – [31]

DRAM RAS# ACT Time

Conguration options: [Auto] [1] – [63]

DRAM Command Rate

Conguration options: [Auto] [1N] [2N] [3N] [N:1]