User Manual

22
ROG STRIX Z790 Series (Intel
®
14
th
) BIOS Manual
DIMM Flex
Enable to configure DRAM Timings and Frequencies based on DRAM Temperature. Set this
item to [Disabled] to disable this feature.
Configuration options: [Disabled] [Enabled]
• DRAM settings will remain at Level1 at BIOS boot until the handover to OS.
• The following item appears only when DIMM Flex is set to [Enabled].
DIMM Flex: Dynamic DRAM Temperature OC Switcher
Configure DRAM Timings and Frequencies based on DRAM Temperature.
DIMM Flex Presets
Allows you to select DIMM Flex Presets for different memory modules.
Level1 DRAM Temperature Threshold Value
Set the boundary separating Level1 Values and Level2 Values. When DRAM
Temperature is below or equal to this value, then Level1 Values get written. If above
but below Level2 Threshold Value, then Level2 Values get written. Temperature is
in degrees Celsius and at a measurement point close to the center of the DRAM.
Recommend Level1 Threshold value is 45.
Configuration options: [0] - [99]
Level2 DRAM Temperature Threshold Value
Set the boundary separating Level2 Values and Level3 Values. When DRAM
Temperature is below or equal to this value, then Level2 Values get written. If
above then Level3 Values get written. Temperature is in degrees Celsius and at a
measurement point close to the center of the DRAM. Recommend Level1 Threshold
value is 55.
Configuration options: [1] - [100]
Configure Level2~3 DRAM Timing Control
Allows you to configure the Level2 / Level3 DRAM Timing Control.
Primary Timings
DRAM CAS# Latency
Only Even numbers are supported on DDR5. Odd numbers will be rounded up.
Configuration options: [Auto] [2] - [66]
DRAM RAS# to CAS# Delay Read
Configuration options: [Auto] [0] - [255]
DRAM RAS# to CAS# Delay Write
Configuration options: [Auto] [0] - [255]
DRAM RAS# PRE Time
Configuration options: [Auto] [0] - [255]
DRAM RAS# ACT Time
Configuration options: [Auto] [1] - [511]
Secondary Timings
DRAM REF Cycle Time 2
Configuration options: [Auto] [1] - [65535]