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- 3870 x2 power consumption
- hd power consumption
- power consumption of radeon 3870
- power consumption geforce 8800
- radeon hd 3870 power consumption
- power consumption hd 3870 x2
- radeon hd 3879
- hd 3870 power idle
- maximum power consumption in graphic cards
- gpu measurer
- rv670 power consumption
- radeon hd 3870 temperature
- power supply for radeon 3870 x2
- measure gpu power consumption
- power supply unit efficiency how to read it
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Let's observe the total power consumption at the Power Supply Unit (adding the whole configuration and the losses of the PSU) with each card.

The enhancements made by AMD on the RV670 are interesting. While idle, the consumption of the Radeon HD 3870 X2 is quite a bit lower than a GeForce 8800 Ultra with almost 30 W gained in total. However, at peak, we are dangerously close to the record of the Radeon HD 2900 XT, though never breaking it. Overall, the performance - power consumption ratio isn't really in favor of the 3870 X2, as it's similar to that of the 8800 Ultra, despite its age. We could have done much worse however, given the nature of the card and the usually poor efficiency of multi GPU solutions.
Compared to the HD 3870, the power consumption increases by 82 W, once the PSU's losses are subtracted. We've also noted higher consumption peaks reaching 385 W in some games (e.g. STALKER). The value of 196 W given by AMD regarding the maximum power consumption of this HD 3870 X2 seems to fall far short and we recommend the use of a 450 W (branded!) power unit supply for a classic high end configuration, not too overclocked.
Temperatures
Regarding temperatures, and despite the fact that the heat sink remains extremely hot, the standard design was conceived to speed up at 78-81°C. We haven't gone beyond 81°C according to the drivers, without knowing which GPU was measured. In idle, the temperature dropped to 56°C, which is quite low for a GPU.
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Those are actually Reality Engine 2 boards, not IR boards on the first page.