ASROCK X299 GAMING i9 User Manual page 79

Fatal1ty X299 Professional Gaming i9 Series
Read to Precharge (tRTP)
The number of clocks that are inserted between a read command to a row pre-
charge command to the same rank.
Four Activate Window (tFAW)
The time window in which four activates are allowed the same rank.
CAS Write Latency (tCWL)
Configure CAS Write Latency.
Third Timing
tREFI
Configure refresh cycles at an average periodic interval.
tCKE
Configure the period of time the DDR4 initiates a minimum of one refresh
command internally once it enters Self-Refresh mode.
tCCD
Configure back to back CAS to CAS (i.e. READ to RAED or WRITE to WRITE)
from same rank separation parameter.
tCCD_L
Configure back to back CAS to CAS (i.e. READ to RAED or WRITE to WRITE)
from same rank separation parameter.
tCCD_WR_L
Configure back to back CAS to CAS (i.e. READ to RAED or WRITE to WRITE)
from same rank separation parameter.
tRRDS
The number of clocks between two rows activated in different banks of the same
rank.
tRRDR
Configure Read to Read different rank dead cycle Back to back READ to WRITE
from different DIMM separation parameter.
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