I actually pulled the trigger on the 5700X3D, but it turned out the checkout of OCUK was in chaos earlier this week and the purchase was unsuccessful
Then found a new 5800X3D for a price just a bit higher, thinking I should take the gamble that I can under volt and PBO offset it enough to make sure it runs cool and quiet with my 140 mm AIO. Decided to sleep on it, but the next morning the price had bounced back up.
My trigger was playing The Last of Us. Walked from a no NPC area to a high NPC area, and suddenly my 7900 XT was only running 85-95% utilisation and dropping in to the mid 60 fps range, whereas before it was 75-80s+. That was with my 7900 XT undervolted and max power boost at -10%.
Decided at that moment a CPU upgrade was required.
Now in no man's zone as both the 5700X3D and 5800X3D remain just a tad too pricey to pull the trigger on. Not even 100% sure the X3Ds will sort the drop I saw in TLOU. I looked for info online about the game and mostly see people talking about the issues from its train wreck launch where every hardware configuration was a stuttering mess.
Sadly, my 5800X3D decided to up and die on me out of the blue a few days ago, a mere three months after I bought it.
Damn, there's a good advertisement for making sure you only buy an X3D chip new and not second hand / B-grade for a 10% discount.
Hope AMD gets a replacement sorted for you with no fuss.