Low voltage for the CPU is safe.
Low voltage for the CPU is safe.
Check the safe voltage range for your CPU core. Your motherboard allows up to 1.45V, but staying around 1.4V or slightly lower is generally recommended for stability. Since you're not adjusting the SOC voltage and have room for temperature management, aim for a stable 1.4V to 1.45V range.
It's hard to find anyone who agrees with the warranty language everywhere. In short, nothing guaranteed by default is safe—everything depends on you. For context, lower quality silicon usually needs more voltage to hit higher speeds. I use 1.410v for 4.1ghz performance, while lower-end chips like 220ge need around 1.57v to reach their max frequency. Once those chips stop overclocking, you're limited by your hardware. I’d lower the frequency by about 100mhz as a precaution. Those numbers are just examples—don’t experiment with them. If you manage load under 70°C, it might be worth trying.
You achieved stable operation at 3900MHz with 1.425V, aiming for 4GHz performance. The system remained stable only above ~64°C under full load at that voltage. Below 1.45V, stability failed and warnings appeared.