If uour motherboard can support your new cpu most likely you need bios update. So use your cpu to update motherboard before placing new one inside but went on partpicker and can't seem to find cpu 3700x on compatible list with your motherboard but if it dose work then bios update is needed and you need your cpu 1st gen to do it
Just quick question heard that these cpu can run hot have you got good cooler to work with this new cpu
It should work. It is on the motherboard support list and says it needs BIOS version F40 and you said you already had version F50. When you install the cpu I’d recommend clearing CMOS before the first boot.
The only thing I would try to be carefull with is that the PC Case have good ariflow. After all the R7 3700X has a "lower" 65Watts TDP, but it does need some important power delivering when all cores are taxed.
So is not a bad idea to make sure the motherboard vrm (which does not even have a simple heatsink) gets good ariflow.