Your crashes are showing all the signs of RAM issues, post the below information and we can check it.
Which RAM cards are you running now?
Mixing RAM cards with different timings and frequencies can cause issues.
Can you download CPUZ
and post a snip of the CPU, Mainboard, Memory, and SPD tabs.
For posting the information , enter 'Snipping tool' in the Start button > Search box, hit enter. Select the area you want to post and save to a convenient place. How to Post a Screenshot in Seven Forums
Have you been checking your temperatures?
Use Core Temp
for AMD CPU , to check the CPU temps when at idle, under load and/or testing.
Let us know the minimum and maximum temps you get.
Go to your BIOS and tell us what the CPU, RAM and the CPU integrated memory controller voltages are.