You can try the following:
Resting the BIOS. (Since you upgraded the RAM the system could be trying to run the new RAM at unsupported or odd specifications a BIOS reset can fix that.)
If you are running XMP, try turning it off. (XMP is still an overclock and can be unstable depending on system.)
Verify you are not overheating. (The FX-8350 has a max temp of 61c, depending on XMP, RAM location, or CPU cooler it is possible you are overheating.)