The driver crashes seem to plague AMD GPUs, but when you get the tweaked or dialed in its happy days.
I'm guessing you have a none reference card, these normally come pre overclocked but much higher boost frequency capability.... But the power seems to be limited, when running GPU Z the power draw always flat lines 200-300mhz under the max boost, and what do you know, when the card boosts it tends to black screen, driver reset yada yada yada.
I'd try these:
First I'd check which RAM XMP profile is being applied, just the 5600/5800 CPUs don't have a great pass rate above 3200Mhz, they don't seem to like the FLCK going over 1600Mhz, I'd try a lower RAM XMP profile, once stable you can try tighter timings to make up for the loss in RAM clock speed, and also CPU curve optimisers to lower core voltages, lowering temps and potentially increasing core clock boosting. If the system does hang/crash check the motherboard debug lights, if the memory isn't happy you should see a light on the board or an error code, depending on the board.
Then try in the other if the above does improve stability.
1. AMD Driver DDU (GPU Drivers Only)
2. Increase power limit in adrenalin software
3. Apply a custom fan curve to keep the GPU cooler
4. Reduce the max frequency by 200-300mhz or to the quoted max boost of the reference version of your card, in this case the 6600xt reference card boosts to 2589Mhz
Also worth checking task manager while running games, I've seen the Samsung QVO drivers cause crashes when the cache runs out, your looking for 100% usage on the OS SSD/HDD.
