Welcome Newcomer. Try running MemTest86+ 4.1 on your RAM. Go to www.memtest.org
to download the software. Download the .zip containing the .iso file. Burn the .iso to a cd.
To run the test, simply put the disc that you just burned into the optical drive of your choice and restart your computer. MemTest86 will run itself. Allow the test to run for at least 10 passes (8-10 hours) or unless it finds errors before that and will stop automatically.
If any errors are found, then that's a good indicator that your RAM is bad.