Check out a program called ThrottleStop. Look at this guide (the CPU part): https://forums.dolphin-emu.org/Thread-unofficial-laptop-performance-guide
If you want to check the temperature of your GPU, I'm pretty sure your Nvidia drivers will tell you your current temp. If not, GPU-Z will tell you iirc. It's most likely not an overheating GPU. Your CPU is definitely the culprit here, creating a CPU-based bottleneck on your system.
If you want to check the temperature of your GPU, I'm pretty sure your Nvidia drivers will tell you your current temp. If not, GPU-Z will tell you iirc. It's most likely not an overheating GPU. Your CPU is definitely the culprit here, creating a CPU-based bottleneck on your system.