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Report: AMD Radeon HD 5970
by Damien Triolet
Published on January 19, 2010
Temperatures We took the temperature readings of the GPU given by the internal sensor. With bi-GPU systems, we use the hottest of the two GPUs in our graphic representation. On the motherboard used for this test, the Asus Rampage Extreme, the PCI Express graphics ports are spaced 2 slots apart which means that even with double slot cards, there's a space between the graphics cards which means they can be more effectively cooled than on other motheboards.
 To give you a more complete picture, here are all the readings we took. Note that when the secondary GPUs are in a state of advanced idle, you can’t get a reading from their internal sensors.   The temperatures inside the box increase with CrossFire systems, dangerously so when it comes to the northbridge. Indeed we had to disactivate the motherboard protection that kicks in at 90 °C. Here’s what it looks like with thermal imaging: 
Radeon HD 5970, Radeon HD 5850 CrossFire and Radeon HD 5870 CrossFire, cards in idle.
Radeon HD 5970, Radeon HD 5850 CrossFire and Radeon HD 5870 CrossFire, cards in load.
Radeon HD 5970, Radeon HD 5850 CrossFire and Radeon HD 5870 CrossFire, systems in idle.
Radeon HD 5970, Radeon HD 5850 CrossFire and Radeon HD 5870 CrossFire, systems in load.
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