Your minidump files now indicate a river associated to the AMD processor.
1
Go to the support page for your PC or Motherboard on the manufacturers website, then from there, download and install the version of Chipset drivers they recommend and while there, check for any BIOS update that may need to be installed
2
Wait to see if your system stabilizes, if not, the best option is to download the widely available free utility MemTest86, then run a full 4 pass scan with that to test your RAM for physical errors