June 2020 - last edited June 2020
Good to hear that you solved it.
In case you still want more Ram, look at the vendors side of your Motherboard.
There you should find a list with Ram that was tested and deemed compatible with your board.
In general it is always better to have two identical sticks, but if you find one on that vendor list that matches the general characteristics of your Ram, it should work just fine.
June 2020
@asimbsim When your computer freezes while you're using the internet, are you playing Sims 4, or do you have Origin open, or any other apps aside from a browser or two? Is there any pattern to the freezes: a website, the amount of time you've been online, etc.?
Please also look in the Reliablity Monitor for any errors that correspond with a time you saw one of these temporary freezes. Hit Windows key-R and enter "perfmon /rel" without quotes. You'll see a chart of errors and updates, with a column for each day. (Today is on the right.) For the last couple days, please look for any entry that happened at the time of a freeze. You'll need to click "view technical details" to check the timestamp, as the times listed on the chart can be off by an hour or so.
For any relevant entries you find, please click "view technical details," copy the information, and paste it into a text document (Notepad is fine). Then attach the .txt file to a reply.