ASROCK X99 WS - Page 74

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Write to Read Delay (tWTR_L)
e number of clocks between the last valid write operation and the next read command to
the same internal bank.
Read to Precharge (tRTP)
e number of clocks that are inserted between a read command to a row pre-
charge command to the same rank.
Four Activate Window (tFAW)
e time window in which four activates are allowed the same rank.
CAS Write Latency (tCWL)
Congure CAS Write Latency.
tREFI
Congure refresh cycles at an average periodic interval.
tCKE
Congure the period of time the DDR4 initiates a minimum of one refresh
command internally once it enters Self-Refresh mode.
tCCCD
Congure back to back CAS to CAS (i.e. READ to RAED or WRITE to WRITE)
from same rank separation parameter.
tCCCD_L
Congure back to back CAS to CAS (i.e. READ to RAED or WRITE to WRITE)
from same rank separation parameter.
tCCCD_WR_L
Congure back to back CAS to CAS (i.e. READ to RAED or WRITE to WRITE)
from same rank separation parameter.
tRWSR
Congure READ to WRITE same rank dead cycle Back to back READ to WRITE
from same rank separation parameter.
tRWDD
Congure Read to Write dierent DIMM dead cycle Back to back READ to WRITE
from dierent DIMM separation parameter.