ASROCK Z87M PRO4 User Manual page 71

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.
tREFI
Configure refresh cycles at an average periodic interval.
tCKE
Configure the period of time the DDR3 initiates a minimum of one refresh
command internally once it enters Self-Refresh mode.
tRDRD
Configure between module read to read delay.
tRDRDDR
Configure between module read to read delay from different ranks.
tRDRDDD
Use this to change DRAM tRWSR Auto/Manual settings. The default is [Auto].
tWRRD
Configure between module write to read delay.
tWRRDDR
Configure between module write to read delay from different ranks.
tWRRDDD
Use this to change DRAM tRRSR Auto/Manual settings. The default is [Auto].
Configure between module write to read delay from different DIMMs.
tWRWR
Configure between module write to write delay.
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