Power consumption
All three cards are no slouches, that must be stated first. However, the two representatives with AMD chips are at a disadvantage in multi-monitor use at the latest, because the clock goes up to 500 MHz and the consumption increases quite decently compared to the GTX 690.
BluRay playback is once again a chapter to shake one’s head at, because AMD has still not managed to adjust the drivers accordingly so that the extremely high power consumption can be avoided. The values we measured are simply out of date.
The difference in power consumption during gaming between the GTX 690 and the dual-GPU cards with AMD chip is at least 70 watts, which is already a house number. Of course, you can argue that someone who can afford these acquisition costs could also afford the maintenance – but from an environmental point of view, 70 watts (and more) are too much for approximately the same gaming performance.
We’d better politely keep quiet about the worst case under full load. More than 570 watts of waste heat are actually only insanity in the end and in the best case still an optional heating replacement for Siberian winter nights when the floor heating goes on strike.
Temperature development
We have already guessed: where a lot of power is consumed, a lot of waste heat is also generated. Let’s now take a look at how well the respective cooling solutions cope with this task:
At idle, all cards are roughly on the same level. Temperatures rise highest on the EVGA GTX 690 as performance increases, but this is more the result of the fairly good compromise between performance, cooling and noise. However, 88°C in a closed case is a bit too much, especially since we tested in a constantly cool room with only 22°C room temperature. The PowerColor Devil 13 has the biggest cooler, and this can be seen in the surprisingly moderate numbers in the stress test in the end. HIS’ solution can keep up quite well and only suffers a bit in a closed case due to the Phantom 820’s design, whose side panel cooler pushes the exhaust air back into the card.
- 1 - Introduction and overview
- 2 - The challenger: HIS 7970 X2
- 3 - The efficient: EVGA GTX 690
- 4 - The beauty: PowerColor 7990 Devil 13
- 5 - Synthetic benchmarks
- 6 - Gaming benchmarks (Catalyst 12.11)
- 7 - Micro stuttering: the current situation
- 8 - Micro stuttering: AFR render methods
- 9 - Micro stuttering: adaptive VSync (Nvidia)
- 10 - Micro stuttering: dynamic VSync (AMD)
- 11 - Power consumption and temperatures
- 12 - Fan speed and noise (with videos)
- 13 - Summary and conclusion
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