Troubleshooting worst PC problems
One day you may be in panic for finding out your files have vanished from your PC. Whether the problem involves software or hard drive, you can actually pull through the mess.
So you may have added a stick of RAM and then suddenly your PC seemingly crashes down: boot routines fail and there are sudden shutdowns. This can mean you have a case of bad memory upgrade.
Also, new addition to your memory may not be compatible with the existing one. In this case try to boot your PC and enter the memory settings. From there you can reboot again and wait for results that will show how the two memory sticks react to each other.