-Under system idle? I don't understand what it exactly means. I just captured the fan speed section from MyAsus app. At that time, I didn't run my Unreal Engine 5.
-How is the speed at begining?
It turns around those numbers: CPU upper than 4000 rpm, GPU upper than 5000 rpm. I don't know it is normal to have these numbers. Because by the misjudgement of MyAsus App fan diagnosis, I got once the left fan changed by Bangkok Asus technical team at home and after the system diagnosis at BIOS, he didn't say anything if these numbers were normal or not, so I don't know if these rpm numbers are normal.
-The battery mode at that moment is Battery health charging (at 80%)
The pictures below were captured after running my Unreal Engine 5 project.