https://wccftech.com/dram-calculator-for-ryzen-1-7-1-download/

The DRAM Calculator for Ryzen 1.7.1 which supports AMD's Ryzen CPU platform is one of the few versions that has received a global memory retest on the newest AGESA. Over 900 hours were spent testing memory based on Samsung b-die, Micron e-die (062 and 055), and Hynix CJR(DJR) chips.

The changes affected all settings, from procODT to VDDG operating voltage. Another important change is the presence of profiles with odd tCL15, this will eliminate the problems that users have encountered trying to stabilize the system with the value tCL14. Also in this release, the user interaction with the program has been simplified, in particular, 1.7.1 has deleted the R-XMP button (one extra user action). Now the order is as follows: