Radeon HD 6870 and HD 6850: Infrared Pictures and Power Consumption
Thermal imaging of the Radeon HD 6870 under load – source
Thermal imaging of the Radeon HD 6870 in idle
Here are some pictures of the Radeon HD 6870 and HD 6850 in idle mode and under load (the cards are stressed either by FurMark or by the 3DMark06 pixel shader test, both tools are used by the Hardware.fr team test stress test the cards).
Thermal imaging of the Radeon HD 6850 under load – source
Thermal imaging of the Radeon HD 6850 in idle
Here are the GPU temperatures for several recent cards including of course the HD 6800 series:
And here are the real power consumption of eack model of card (not of the whole system as usual) under FurMark and the pixel shader test of 3DMark06: