I have an i5 4690k (with a gtx 1070 ti) for 3.5 years. Having tested the temperatures in the past, they have been mostly normal. It's been some time though, that the computer's performance has dropped considerably, and upon testing, the cpu reached 97C on burner. I changed the thermal paste (to Arctic MX-4), and now it's 84-85C with a few spikes to 88C. As I've read, that's too high still. I hadn't moved the stock cooler before, so it wasn't misplaced. The idle core temperatures vary from 38C to 52C. Not overclocked, as far as I know. The fan RPM was around 1900RPM idle on BIOS, which seems a lot. Motherboard : Asrock Z87 Pro4. Moreover, in some benchmarks I've tried, the cpu seems to be underperforming, in the 27th percentile for the same setup. I would like to find a solution, both to the overheating, and to the performance drop.