Glad it's running cooler and no BSoDs, if you want to fix the hanging issues we can look at the dump files, if you have any.

Check if you have any new dump files, if you do then attach the files as recommended in these instructions. There is more information in the files that we can look at.

Blue Screen of Death (BSOD) Posting Instructions

With all the new RAM you added can you post the CPUZ snips again of the CPU, Mainboard, Memory, and SPD tabs.
Include an SPD tab of both brands of the RAM, old and new.
Quite possible there is something there that needs adjusting.