No, 100°C is not safe for a MOSFET as it can cause thermal damage.
No, 100°C is not safe for a MOSFET as it can cause thermal damage.
I just increased the overclock of my IGPU (VEGA 11) from 1400mhz to 1750mhz on my budget build. It’s working fine, but I noticed the MOSFET temperature is hitting 100°C. Is that safe? Or should I lower the overclock so the MOSFET stays cool?
The exact model is not specified. The SOC voltage was set to 3.3 volts.
Under stress? Or was it checked when idle? Those voltages are quite intense for the module. Keep it below 1.2, see how it behaves, and consider adjusting airflow near the VRM before watching temperatures. The 100°C on the MOSFETs isn't too bad as long as the CPU isn't throttling. Overall, it shouldn't harm the MOSFETs most of the time.
The mosfets should handle it, they’re designed for at least 125°C, some last longer at 150°C. Reducing them to about 95°C over time would be better—especially if you run them at 100–110°C for weeks. The printed circuit board might start to degrade after a while, but that’s only a few hours a day during gaming. Adding a fan with a 92–120mm blade on the heatsinks could help keep things cooler.
The rating only reflects performance under extreme conditions, not real-world use. It’s a guideline, not a guarantee. Quality matters more than origin or batch. If reliability is key, maintain optimal temperatures. Poor airflow can stress components, causing overheating and failure.
The rating refers to the real mosfet chip used in the board. These are produced by American firms in countries such as the US, Taiwan, and China, and they’re shipped in many locations including Hong Kong and the Philippines. Because of the chip’s design, it can endure up to 125°C continuously—unlike capacitors that lose efficiency from prolonged heat. As long as the heatsink effectively dissipates the warmth, the temperature stays below this limit. Most boards also include temperature sensors that monitor the heat and automatically reduce the VRM output if things get too hot. In this scenario, overclocking the GPU pushes the VRM to generate extra heat. This causes the VRM to throttle the GPU’s clock speeds temporarily, lowering power use and thus reducing heat production. As a result, the CPU cools more efficiently, allowing the temperature to drop to around 95°C or lower. Once it reaches that point, the VRM signals the GPU to lower its speed, which further cuts power consumption and lets the system stabilize at a safer level. The motherboard remains intact, and the overall average temperature stays within acceptable ranges. For better comfort, adding a fan to enhance airflow over the heatsinks can help, or slightly lowering the GPU voltage and frequency can also ease the load.