yeah, the auto oc was probably bumping more voltage then necessary, but even with that said 75 degrees most certainly is not high for a 7700k period, let alone a OCed one. like i said, the voltage was likely too high so it was ramping up to higher temps than need be, but the spiky nature of the 7700k is normal and even stock 7700ks will ramp up to 70 doing light tasks for a split second. the key is just to make sure that under heavy load(stress tests) youre under or around 85 and youre fine.