There may not be anything wrong with your RAM. Have you tested it with Memtest?
If not, download the memtest .ISO file and use it to make a memtest boot disk. With a single stick of RAM ONLY in the first memory slot, let the pgm run for at least one full pass. Overnight would be better if the issue is heat related. If evn a single error shows up, that stick is defective. If no errors appear, your memory is almost certainly OK.http://www.memtest.org/