Looks like its the boost clock you are seeing which advertises as upto 4.2ghz, not an overclock![]()
No leave it, if it's only the turbo it isn't an overclock.
From what I have read in reviews the 3600 usually boosts to over 4Ghz on all cores anyway so you are probably losing performance by locking it at 3.89Ghz. Set it back to stock and monitor it's boost while loading the cpu. If you wanted to overclock you should have got a B450 motherboard. The A320 has way too many compromises which is why you rarely see anyone using one on here.
What about RAM then ? I'm happy to OC that a bit. I changed the freq from 2400mhz to 3000mhz
Ram is definitely worth overclocking with Ryzen, but it depends on what ram you own. If its possible to overclock to 3000mhz then definitely go for it