I work nights, so I'm basically on Australia hours.
Your RAM timing should be 15-15-15-35 for your 2400MHz RAM. However because it was never actually set in BIOS, it's running on Motherboard manufacturer default "safe" timings. As a result, it is sitting at 2166MHz and pulling down the performance of your CPU.
This misrepresentation is also known to cause issues that will appear very similar to RAM sticks going bad.
Also note that since you aren't using a 3rd party AV solution, Defender is enabled. You must exclude the client from that. It's almost worse than Norton for killing games. Almost.
Your system BIOS is obsolete. It's like it's the default version from the original board printing. Get the latest here, or use Armoury Crate to update. You have version 1004, and should be on 2006. While you're at it, ensure that you have the latest drivers in Armoury Crate as well. The last Windows update replaced core chipset and LAN/Wifi drivers with extremely obsolete versions.
Your GPU driver is outdated as well. Get the latest version from here. Choose to go without GeForce Experience, and choose Custom Install so you can tick the box to perform a clean installation.
Other than that, I don't see anything that really stands out. Your most crippling problems are the BIOS that expired two years ago, and the incorrect RAM configuration.