
Disable CPU boost to increase your iGPU core clock.
I did a video on it. Didn't make a huge difference in this case, but if you have a high base clock CPU and your iGPU is throttling, it will be beneficial to disable CPU Boost on GPU intensive games. It also lowers heat a good bit which can also help stop throttling.
Laptops benefit from this. It is unlikely to help a desktop.