I've recently updated my Bios and decided to retest my memory profiles, so I started with this one. I found out that I could stabilize GDM disabled with Processor CA Drive Strength set to 30 Ohms on the previous A91 Bios and did a 9 hour run with Prime95 with no errors, so I decided to retest this on the new A95 Bios to confirm if it works and it did. I've also found that I can now use CK/CS ODT Groups on this Bios version, so I could possibly stabilize DDR5 8200 via BCLK.
CPU: 7800X3D, PBO – Auto, VSOC – 1.10V.
Motherboard: MSI X870E Tomahawk, LLC – Mode 3.
RAM: Corsair Vengeance (Binned to CL-30 DDR5 6400 1.40V) (Hynix A-Die).
VDD – 1.68V. (Could do 1.66V).
VDDQ – 1.45V.
VDDIO – 1.45V.
VDDP – 1100mv (Auto).
VDDG – Auto.
IOMMU – Disabled.
TSME – Disabled.
1/3/1 Nitro – Enabled (8X-8X).
CPPC – Frequency.
Processor CA Drive Strengths – 30 Ohms.
DFE Taps – Auto.
All other drive strengths are automatically set by Bios.