No, they will not all throttle to an extent. Winter gaming see's my temps no higher than 45c and summer gaming see's my temps no higher than 65c (and I am talking long sessions here). You go and tell all the water cooled boys that they will see throttling to an extent in the Summer and they will laugh at you.I also don't have the best air flow for my system and could get the temps lower.
I never said that, unless you are taking it out of context, don't know if that's intent or not?
Read what I said again, long story short, I said max oc's for water in winter is going to be higher than summer, hence mentioning the thread, your taking it down a different route.
AMD/Nvidia reference cards will both throttle in the summer if they get too hot, the fault may not always be the fault of the card, sub par air flow will hit harder, the card gets the blame.
Noise on the reference AMD will be a bigger issue in the summer than heat as it will hit 95c quicker and need to spin faster.