Excellent point, Ken1649. Multi monitors, crossfire, etc throw all sorts of intangibles into the mix.
As an aside, it will be nice when we see technological "advancement" give us less heat and less power consumption for lots better gpu performance. I see (rumor photos) that the new AMD 7000 series has two 8 pin power plugs and is giant in size. The CPU race on the other hand is wonderful. The latest intel products give fantastic performance and run at 33 degrees. But I guess that it is the whole different paradigm of making one chip better (the cpu) versus making lots more processors in one location (the gpu).
Regardless, do you have the F3 bios installed? Here are the purported changes listed on the Gigabyte website that the Gigabyte F3 bios update will do for the SOC.
1.ATi Source BIOS Version: 012.019.000.008
is 950/1250 MHz
4.Enhanced smart fan function
The last thing about the enhanced smart fan function sounds like an interesting issue in regards to temps. That is why I tried (but did fail) to flash it onto my OC card. But it probably would have been a mistake to do so since it would have set the clock way too high.
When you are running less intense stresses than the Kombuster test such as Heaven DX11 do you see any change by downclocking your gpu? I see zero temperature benefit for crash prevention. When I would down or up clock the gpu it would crash or not crash but the crashes would not be related to the (reported) temperatures. Maybe it was voltage bleed over or something else but cooling does not seem to be the limiting factor.
But the heat of these cards do "age" the physical appearance of the products. All the paper labels, etc. are getting that nice brown crispy look.