Dram Frequency - ASROCK X99 Taich User Manual

DRAM Frequency

If [Auto] is selected, the motherboard will detect the memory module(s) inserted
and assign the appropriate frequency automatically.
DRAM Frequency OC Preset
If the DRAM frequency is selected, the corresponding DRAM and BCLK frequency for
overclocking will be set.
Primary Timing
CAS# Latency (tCL)
The time between sending a column address to the memory and the beginning of the data
in response.
RAS# to CAS# Delay (tRCD)
The number of clock cycles required between the opening of a row of memory and
accessing columns within it.
Row Precharge Time (tRP)
The number of clock cycles required between the issuing of the precharge command
and opening the next row.
RAS# Active Time (tRAS)
The number of clock cycles required between a bank active command and issuing the
precharge command.
Command Rate (CR)
The delay between when a memory chip is selected and when the first active command can
be issued.
Secondary Timing
Write Recovery Time (tWR)
The amount of delay that must elapse after the completion of a valid write operation,
before an active bank can be precharged.
Refresh Cycle Time (tRFC)
The number of clocks from a Refresh command until the first Activate command to
the same rank.
62