@pastanaga - If you've never done it before, make sure you back up your computer regularly (you should be doing this anyway). I find the easiest way is to set it up so that your new saved files go to a cloud server each day, but it's important to also try and use a backup like putting them on an external hard drive. Multiple failsafes is a really good idea.
Although, even if you damage your RAM you might not lose your stuff. And RAM isn't that expensive anymore, so it's probably not going to be a big deal whatever happens.
There are some really good tutorials on doing this if you go looking for them. Make sure you read the comments to get an idea of whether the instructions are actually going to work though.