SonnyBlue :
MeanMachine41 :
Your G.SKILL Ripjaws X Series 8GB (2 x 4GB) are not a mismatch, however that does not rule out a failing module. You can also check the MB QVL to check they have been tested.
Are the 16GB RAM modules composed of two 8GB kits.? If so this can be an issue as its never a good idea to mix kits,even of the same spec.
RAM is binned in kits at the manufacturers factory to ensure latency compliance due to minor imperfections.
Run memtest86+ from a USB stick to rule out the possibility of DIMM failure.
If all DIMMs pass 3 passes on all modules then Stress testing should find the culprit.
For Stress Testing download HWMonitor and AIDA64 and put them side by side on your desktop. I'll guide you where to go from there.
I have both programs now, if you have time to help me that would be great.
OK go into the Tools section of AIDA64 and select to run the stress test.
Tick the boxes for CPU, FPU and Cache. Run the test for 10mins and stop the test if temperatures reach 80C.
Later you can also run tests for other sub systems if you wish. Run test on RAM separately.
Constantly monitor HWMonitor for system temperatures and do not leave unattended.
At the 10min mark, take print screen shots and upload pics to your favorite file host.
You can use IMIGUR as a host, upload the files then go to images. Here you can obtain the BBurl to link here for analysis.
If you can't get all info, page down or change menu screens and take more shots. Select those pics you wish to have analysed.
I would want to see all rail voltages during the test with 100% utilization on all cores.
Try with just one kit of matching RAM initially.