what do you mean with "normal" ramspeed?
because XMP is already "overclocking"
do you use 2x 8GB or 1x 16GB?
what RAM do you use: like Ripjaws V or Trident-Z or Ballistix Sport or Corsair LPX etc
FIRST:
try to run your ram as DDR4-2133 MHz with your XMP Timings (like CL14 or CL15 or CL16 etc)
if its rockstable with 2133MHz RAM clock you need to find a stable RAM OC
SECOND:
if its not stable with 2133MHz RAM clock you can do the following:
- lower GPU clock to "reference card"
- disable Win10 GameMode
- uninstall driver via DDU in SafeMode and do a clean driver install
- lower ingame settings a little (from ultra to very high etc)
- dont run any background programs etc
- disable as many unneeded windows services as possible
- disable Windows Defender and Realtime Protection (this is usually a good start with your CPU - because 4C/4T is not "much" in these days) // have in mind you will then have no virus protection etc
what OTHER Problems does the CPU make?
usually Ryzen APUs are a little picky when it comes to RAM and RAM-OC - that was the main reason why i asked about your OC/XMP 
cope140 2933 or 3200 IS NOT NORMAL SPEED BUT OC
use RAM as 2133!
and test again.
btw - 1 Stick means you run Single-Channel - that is a huge performance impact - try to get another Trident-Z 16GB dimm and run dual-channel
or sell your stick at ebay and buy 2x8GB DDR4 3600CL16 RAM
