TL;DR: as far as I can tell. Setting tRAS to 126 has no effect on performance. While setting tRAS too low can cause stability issues. Also AMD's memory controller doesn't follow the JEDEC spec of tRC = tRAS+tRP. So setting tRC really low even to the register limit of 32 actually gains performance even when tRAS and tRP are set to 126 and 36(which according to JEDEC would be a tRC of 162). IDK if tRC 32 is good idea(as in stable).
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