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The original was posted on /r/overclocking by /u/iiAvoe on 2023-08-08 04:08:16+00:00.

Just posting my memory overclocking experiment with the new BIOS

Platform: Ryzen 7700X, MSI B650 Edge

Memory: F5-6400J3239G16G (6400MT/s 2x16GB 32-29-29-102 CR1T Hynix A-die)

XMP only OC in AGESA 1.0.0.7A stable BIOS:

6200MT/S After OC in AGESA 1.0.0.7A stable BIOS:

  • Downclocking to 6200MT/S to pass Memtest64 here is a must
  • Same OC settings as Buildzoid’s stable Hynix timings
  • AfterOC.png

6200MT/S After OC in AGESA 1.0.0.7C beta BIOS:

6400MT/S After OC in AGESA 1.0.0.7C beta BIOS:

  • I’m using the iGPU on 7700X here which cumbers some performance
  • Same OC settings as Buildzoid’s stable Hynix timings
  • Another visible bandwidth improvement, without a change in latency
  • It passed MemtestPro, all 16 threads in 29760MB for 1.5 hours test with ease (manually stopped at 121% coverage)
  • It passed y-Cruncher for with each algorithm taking 120 seconds, manually stopped after half an hour
  • However, I only got it to boot once & never again, it appears to be stuck on POST. I have tried these following (which involves resetting BIOS for ~30 times) but non of them worked
    • Raising DRAM voltage (VDDQ, VDDIO, DRAM-VDD) from 1.35V to 1.38V
    • Raising SoC voltage from 1.25V to 1.28V
    • Reducing PBO2 negative offset from 26 to 25 (CPU LLC mode 3)
    • Turning on SoC LLC mode 3
    • Combining all the changes above together aswell
  • I ended up fixed it by dialing back DRAM speed to 6200MT/S and everything went back to normal, so I conclude this as a beta-BIOS thing, it needs a stable BIOS upgrade later
  • AfterOC-BIOS173-6400.png
  • AfterOC-BIOS173-6400-2.png

Sidenote - Buildzoid’s stable Hynix timings: