A temperature of 90 degrees fahrenheit is unlikely to cause you any problems. Typically heat doesn't cause a problem until it gets upwards of 60 celcius which is 140 degrees fahrenheit.
As far as CPUs go... most of the time they're either completely fine or completely dead. Having one that's defective somehow that still works is rare, and if your machine can survive overnight rounds of memtest and Prime95, then it's probably not a power supply issue either. Swap in the replacement memory when it gets there and re-run your stress tests. I'm thinkin those problems will go away.
There are any number of things which can cause spikes in CPU temperature. The most obvious is increased CPU load from some application. The monitoring software can sometimes get lost in translation as well, and give you temperatures which are totally off the wall. I often skip the monitoring software altogether and judge temperatures by touch just by the heat coming off the heatsink. The heatsink will be uncomfortably or even painfully hot if temperatures really are dangerously high.
Do not meddle in the affairs of archers, for they are subtle and quick to anger.
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02:50 PM by