RAM errors can manifest themselves in multiple ways. You might get an error at startup of the computer, that the RAM cannot be verified. You may be using Windows and randomly get a blue screen, like in the screenshot below. RAM errors usually do manifest themselves if you have a faulty RAM stick. However, it may not always be easy to recognize that there is a problem with a stick of RAM. Furthermore, how do you diagnose which piece of RAM is having the problem?
If you’re getting blue screens on your computer, or something else that may cause you to think that there is a problem with a piece of RAM, it may be time to run a memory test. These programs will run tests against your memory to determine if there is a problem with the RAM. There are similar programs out there that test the validity of your hard drive, too – but in this case, we’re talking about RAM testing.
In order to effectively run a memory test, try using a program like Memtest 86. This program will require you to make a boot disc. You can make a DVD or a USB bootable device. Many computers no longer have DVD drives, so you’ll likely create a USB bootable device. Once the mem testing boot drive is created, boot it up and run the default settings for a full pass. This can take some time. If the RAM passes the verification check, the RAM should work without issue. If it fails, then you know that there is a problem and you should replace the piece that has failed.