DRAM Timing Configuration - DRAM Timing Configuration - 3.1.0 English - 68886

Ryzen Master User Guide (68886)

Document_ID
68886
Release_Date
2026-05-20
Version
3.1.0 English

You can view the following DRAM timing configuration values:

Table 1. DRAM Timing Configuration
Parameter Description
Tcl CAS Latency
Trcd Row Address to Column Address Delay
Trp Row Precharge Delay
Tras RAS Active Time
Trc Row Cycle Time
Trfc Refresh Recovery Delay Time
Tfaw Four Activate Windows Time
TrrdS Activate to Activate Delay Time, different bank group (tRRD_S)
TrrdL Activate to Activate Delay Time, same bank group (tRRD_L)
Twr Minimum Write Recovery Time
TwtrS Minimum Write to Read Time, different bank group
TwtrL Minimum Write to Read Time, same bank group
Trtp Read CAS# to precharge time
TrdrdSc Read to Read timing same chip select
TrdrdScL Read to Read timing same chip select same bank group
TrdrdSd Read to Read timing same DIMM
TrdrdDd Read to Read timing different DIMM
TwrwrSc Write to Write timing same chip select
TwrwrScL Write to Write timing same chip select same bank group
TwrwrSd Write to Write timing same DIMM
TwrwrDd Write to Write timing different DIMM
Trdwr Read to Write timing
TrfcSb Refresh Recovery Delay Time
Twrrd Write to read timing