Honestly, the period for temps to lower is around 1-2 weeks, but you will likely not see much of a difference. As for the OC, if you had it stable for 8 hours at 4.4, and now you are at the same voltage with 4.3, you have plenty of headroom to drop the voltage. Just lower it in the smallest increments possible, and then test it for 30 minutes in Prime95. If it can survive for 30 minutes in Prime95, it will be rock solid throughout 90% of computing tasks (with the exception of heavy video editing/rendering, I would test it for a couple hours before attempting that). Anyway, 30 minutes can just be for a rough test, and you can test it for 8 hours once you think you have it perfect. It will be a tedious process, but it's the only way to get the best results.