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Report: graphics cards and thermal characteristics
by Damien Triolet
Published on April 20, 2010

Radeon HD 4870 CrossFire
We wanted to see how a multi-GPU system behaved in terms of heat radiation. We opted for a CrossFire system based on 2 Radeon HD 4870s which also have the advantage of being comparable to the Radeon HD 4870 X2. On top of adding a supplemetary heat source to the system, the second Radeon also takes up a lot of space, and it is interesting to see the effect this has on the different readings.




Infrared thermography

System in idle.


System in load.


Graphics card in idle.


Graphics card in load.

Even in idle the system as a whole is relatively hot, which confirms what we feared.


Temperature and noise level readings

The temperature readings confirm this with very high levels both for the system in idle and in load. Noise pollution increases also and rapidly becomes unbearable in load, once again because of the variations in fan speed.

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