For anyone experiencing very high temperatures on these cards...
Firstly, I'm going to state that the following is merely my opinion, which I am basing on my own personal experience with the Direct CU II.
In my opinion, there is too much weight hanging on those 4 springs, and I believe the springs aren't strong enough to maintain full contact between the GPU and the sink.
I purchased my first 6950 a few months ago, and when I first installed it the temperature was rising very rapidly and reaching around 92 deg C within 15 seconds of starting Furmark. I knew this couldn't be right, so I ran Furmark for a second time, and this time, while it was running, I got a hold of the heat pipes at the end of the card, to see if it felt as hot as it was reporting. As I took hold of one of the heat pipes, I noticed that the rate at which the temperature was rising, slowed quite considerably, and maxed out at 84 deg, as opposed to the previous reading of 92 deg.
I had a quick eureka moment... I removed the card, wrapped a few cable ties around (just where the shroud narrows) to take some of the weight, tightened the cable ties a little and reinstalled the card. The difference was amazing, the card now reached 76 deg C max, and lapping the sink brought this down to around 70 deg.
It's my opinion that hanging the weight of the cooler, shroud and fans from those 4 little springs (it's mostly hanging from 2 springs really, the other 2 are acting as a fulcrum), is the reason these cards are overheating. I think the weight is pulling the sink away from the GPU, so If you have one of these and it's getting hot, wrap a few cable ties around the centre of the card, to suspend the weight of the heat sink, then see how your temps are.
Like I say, this is only my opinion, and there may be nothing wrong with the design of the cards, but give it a try.