Hey seriously I don't have a problem purchasing a new one. I always plan on that possibility. It the price you pay when you want to overclock.
The i7-4790K was priming without problems on stock when I purchased it and it was also doing it after delidding it and on 4,8 GHz Core. It was only when I started to push the Uncore that I received issues. Even after I reset the BIOS Ty default the problems still persist. The Linux error issues indicate that either the Cache or the Timer from the Mainboard is faulty, but since I exchanged the mainboard and checked every other component it pretty save to assume that the CPU degraded. Now is is because I pushed close to 1,35 V? Perhaps but that was Core Voltage and other people seem to be running fine on it.
Prime 95 28.5 is an extremely heavily load. But that's the point if it is stable under these conditions voltage and temperature wise it's save to assume any other load will require less voltage and produce less temperature.
I believe Ringbus overclocking is just really not useful at all, because you only get small increases in synthetic benchmarks. But not only that, I seem like it can be really dangerous and it seems to be more sensitive to high currents. Oh and I was trying to get more core and Uncore in sync meaning 4,8 GHz for the Ringbus.
4,6 GHz was fine for both off them, but well I got greedy...so I'll have to pay the price.