I have a 2x16GB dual rank 3200/14 1.35V samsung b-die kit. 5950x on X570 Unify. I set an extra fan on top of the GPU that is pushing air directly into the RAM. I'm following this RAM OC guide: https://github.com/integralfx/MemTestHelper/blob/oc-guide/DDR4%20OC%20Guide.md
I'm on the step of lowering tRP, and my current timings are:
3733 MHz 16-17-13-48
With the voltages as described in the guide (1.45V DRAM, 1.10V NB/SoC) and with geardown mode enabled. Topped out at 3733 because 1900 MHz FCLK threw a bunch of errors. tRCD 17 seems fully stable. I saw a single error at tRCD 16 very early on, but couldn't reproduce it. I'll revisit tRCD later, and will also revisit tCL to try and get it to 15 with geardown mode disabled (tCL 14 was potentially stable at 1.5V but I'm not sure if I want to run 1.5V).
Benchmarks seem to still be slightly improving. I've noticed no WHEA errors but I haven't done a full test yet. On tRP 13 I've ran benchmarks, default TM5 test, and an hour of anta777 extreme with furmark running simultaneously to dump heat into the case. No errors. My strategy has been to tighten timings and run lighter tests until there is instability, then step back with medium tests a bit, and then "finalize" with OCCT SSE+AVX and TM5 anta777 extreme full tests.