So plot twist. I should have been more vigilant when buying from an independent store but after I booted up, I noticed I had 12 gb of installed RAM rather than 16. I powered off, took both RAMs out and popped the “new” one into the slot that I knew worked prior. It showed up as 4gb. I powered off, looked at the stick and sure enough, the guy sold me a 4gb stick and the 8gb sticker was on top of the packaging so I didn’t notice when I bought it. Now I’m expecting this guy to accuse me of replacing the product and trying to scam them when I return it…smdh…