If I apply Arctic Silver 5 between my clean CPU and HS/F, how long do I need to let it 'age' before I can OC and run stress tests using Prime95? I've read that AS5 require a long break-in period of rising and falling temps before it is at its best.
Supposedly, the curing time is "up to" 200 hours, but there will only be maybe a 1-3C difference. Personally, I've only ever seen a 1-2C difference in my own experience. I'd say you're free to stress test all you want, and actually stress testing can be a good thing, since that takes the temps up enough to allow the AS5 to go through temp cycles (may speed up curing time).