Adjust undervolting settings for an R7 2700/MSI B450M mortar.
Adjust undervolting settings for an R7 2700/MSI B450M mortar.
You're starting undervolting on AMD systems and are struggling to understand the process. Your current configuration includes a Ryzen 2700x stock with the Wrath Prism cooler, an MSI B450M Mortar, 16GB Corsair Venge Pro 3200MHz RAM, a GTX 1080 Ti, and several Corsair fans. You're experiencing high temperatures—up to 80-85°C on both CPU and GPU during gaming at 3440x1440 resolution. While the GPU temps seem normal at this resolution, your CPU temps reach 85°C even with Cinebench R20, prompting you to consider lowering voltages. You've experimented with fan curves and set everything to auto based on CPU temps, but results haven't improved. In the BIOS, you've adjusted the CPU core voltage mode to Offset and used the (-) offset setting, yet you're unsure where to begin or what other options exist. The side panel shows cooler temperatures (around 70°C for the CPU) and GPU temps near 78°C, suggesting airflow might be an issue as well.
You haven't made mention of the CPU cooler you are using (Stock Wraith Prism), but you are correct in seeing the case has bad airflow. Nobody is going to give you an accurate voltage offset to use, as it depends on your specific piece of silicon. I reccomend slowly notching down the voltage in small increments until you find it unstable. Keep in mind, it might not reflect in the temps if the system is power-bound, as it will increase performance before dropping temps. MSI boards also allow you to set a custom target power, if you wish to simply reduce temperatures.
I understand the context but need guidance on where to begin in V. The target power concept helps balance cooling efficiency with system performance.
I understand that reducing voltage can lower performance, but it could be beneficial. Your idle temperatures are something to check. A suggestion from Reddit was to replace the upper dust filter, which did help reduce some heat. If you're comfortable with that, giving it a try might be worthwhile.
I struggled to get offsets functioning properly, so always check the voltage values—PBO will disregard them. Even with strong negative offsets, Zen will still start and look operational, though performance will drop noticeably. PBO applied excessive voltage for me, making it hard to adjust; I switched to manual settings. Try beginning with a 1.2v multiplier and observe the results (in extreme cases you can reset to defaults if you have a USB). Also test different modes like LLC or low LLC—check the load line and auto settings if MSI remained stable. On my 3600, thermal throttling stopped when PBO was off, but temps stayed below 80°C at higher speeds. I don’t have experience with Ryzen 2000, but it could be worth trying if you have time.
Thanks for the feedback. For single-thread benchmarking with Cinebench R20, a 38 multiplier is typically used for higher performance testing. The term "LLC" likely refers to a CPU model or configuration shown in your attached image—please clarify if needed. Regarding backing up stable BIOS settings, check your system's BIOS menu or use built-in recovery tools; if unavailable, consult your motherboard manual.