Memory Profile; Memory Reference Clock; Qclk Odd Ratio; Memory Frequency - Supermicro C7Z170-SQ User Manual

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tRRD
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VDD [mV]

Memory Profile

Use this feature to set Performance Memory Profiles which may cause
impact on memory behavior. The options are Default Profile, Custom
profile, and XMP profile 1.
If Default Profile is selected, the installed memory will run at 2200MHz if
the detected memory is rated at 2400MHz or above, and run at 1867MHz
if the memory detected is rated at 1867MHz.
When the above is set to Custom profile, the following can be configured:

Memory Reference Clock

This option selects the Memory Clock ratio. The options are Auto, 133,
and 100.

QCLK Odd Ratio

This option enables or disables the quadrature clock odd ratio. The
options are Disabled and Enabled.

Memory Frequency

This option selects the type/speed of the memory installed. The options
are Auto, DDR4-800MHz, DDR4-1000MHz, DDR4-1200MHz, DDR4-
1400MHz, DDR4-1600MHz, DDR4-1800MHz, DDR4-2000MHz, DDR4-
2200MHz, DDR4-2400MHz, DDR4-2600MHz, DDR4-2800MHz, DDR4-
3000MHz, DDR4-3200MHz, DDR4-3400MHz, and DDR4-3600MHz.
Default speed is auto detected.
4-33
Chapter 4: AMI BIOS