AMD says overclocking blows a hidden fuse on Ryzen Threadripper 7000 to show if you’ve overclocked the chip, but it doesn’t automatically void your CPU’s warranty::AMD explains the hidden fuses behind Ryzen Threadripper 7000 processors and how it will handle warranty claims.
No, only if you’ve overclocked and the fault is one that could be caused by overclocking. Honestly, I think it’s absolutely fair for them to not replace a CPU if you killed it yourself by running it outside of spec. Most manufacturers would just say you’re SOL if your CPU dies and it’s ever been overclocked, even if the issue is unrelated, so I think this is a pretty good policy for them to have.
Granted, it’s possible that they could always say that it was the overclocking that killed it whenever the fuse is blown, but considering how heavily AMD leans into customer good-will and positive sentiment about the company, they will probably try their best to honor any legitimate warranty claims.