I have managed to get 1650MHz stable on my 3400G.
MB: MSI B450 TOMAHAWK MAX
CPU: 4000MHz at 1.365V
GPU: 1650MHz at 1.15V
MAX temps in CPU and GPU benchmarks: CPU 80°C (in R20), SOC 55°C, GPU 50°C (in 3DMark) at stock Wraith cooler. (Idle 30°C-40°C)
I think I can push GPU more but what is safe temps for GPU?
Could not find any info about it...