overheating damage

I have a 7700k with h110i water cooling. Originally it was oc 5.2ghz and idled 70c with peaks of 87c. Now (four years later), it's 70c idling in Windows but during gaming is averaging 90-100c, even though I've dropped overclock to 4.4ghz. I have repasted and reseated my cpu. Is my processor dead...