Unable to adjust the SA voltage for the B660+12600KF (MSI Pro B660M-A DDR4) model.
Unable to adjust the SA voltage for the B660+12600KF (MSI Pro B660M-A DDR4) model.
Check the bios settings using E7D43IMS.1E0. Temperatures are staying under 92°C and I believe I missed some points in Cinebench. Apologies, I don’t understand why it functioned the way it did—I just searched online and followed a brief guide that mentioned adjusting the offset. Also, I’m in a different time zone, so my response was delayed; I just woke up two hours ago.
Your capture shows that the BIOS has activated Intel Undervolt Protection, also known as IA-CEP or Intel Current Excursion Protection. Look for a BIOS option or Undervolt setting and consider turning it off. Even if you locate this feature, its effectiveness may be limited. ThrottleStop won’t display Undervolt Protection if you can disable it. Older BIOS versions might still be available, but most companies removed them from their sites—searching through forums is likely necessary. Installing an outdated BIOS can pose risks; it may simply prevent the change or cause hardware damage. If you’re using the B660 chipset, consider reaching out to the manufacturer for guidance. When the B660 was first launched, CPU voltage control was possible. Intel removed undervolting after deeming it undesirable, replacing it with a microcode update. It’s worth noting that ThrottleStop can still raise the voltage, though lowering it is now blocked. The core and cache voltage can’t be reduced in Windows, so the System Agent might also be restricted. BIOS settings for SA voltage can sometimes be adjusted before booting, but proceed with caution. Even minor undervolting can cause significant performance drops—compare Cinebench results between your CPU and a B660 or Z690 board to ensure compatibility.
Thank you very much! I have not tried the "by PWM" option, hopefully it will work for me as well. And any time is great time for a helpful reply. Meanwhile, I have discovered the answer to my original problem: the SA voltage can be changed! It just requires a power-cycle, simply applying changes and rebooting is not enough. Set it to 1.1 V, and my old kit (2019) of 2x16 GB DDR4 3200 CL18 is still working at 3800 / stock CL 18 timings / 1.3 V. This is amazing, on my previous Zen 1 platform I only managed [email protected] V.