That entire heatsink on each card is saturated at 50C! Holy hell on a crutch!
Are those IR pics accurate? That seems excessive... if it actually is 40 - 50C, what's going to happen to them in hot weather?
Maybe Jeff can heat up a room to 85F or so and let it run to see what happens.
Why would he want to do that? I think we can guess what happens. Either they slow down or it hits a temp cutoff that shuts down mining. FYI, high temperatures will have adverse effects on mining operations. What happens to BFL singles when they get too hot, they down-clock until they are within the optimal temperature range.
I don't know if you noticed, but many parts of the world get to be 85F or more during the summer months. Personally, I would want to know if my expensive mining hardware was going to shutdown when the temp rose as it would dictate how much power I had to consume to cool the thing with an AC unit. Maybe you don't care, but I sure as hell would.
In many places where I have lived it is 85F when the air conditioner is running.