Power consumption during gaming
Let’s again compare the just mentioned variants with the factory clock of 1100 MHz, the “Lethal Boost” mode with 1200 MHz and the fixed clock of 1201 MHz. You can clearly see that the limiter does not work under typical gaming loads, which is also due to the very aggressive cooler profile that cools down the graphics card very loudly and, for our taste, excessively. So the first conclusion is: constant clock for our measurements in all three cases.
The most interesting thing about the “Lethal Boost” mode is the possibility to raise the power limit of the limitation by up to 50% (instead of the usual 20%). We therefore even tested 4 different variants during the game run-through. However, since the annoying clock yo-yo between 1200 and 1100 MHz set in again when increasing to 50%, we only measured this option at the fixed clock of 1201 MHz:
You can see a very significant increase in power consumption between 1100 MHz and the higher clock modes. While the average power consumption was still around 204 watts at 1100 MHz, it increases to around 218 watts at 1200/1201 MHz. If you now increase the PowerTune value to the maximum 50%, the power consumption climbs to about 229 watts. We now want to compare whether this power consumption is reflected in the frame rates:
There are hardly any differences in the medium frame rates, at least nothing that would justify a 20% higher power consumption, and exactly what we already noticed in the test of the Gigabyte 7970 Windforce 5X occurs. Above 1100 MHz, clock boosting with Tahiti XT simply becomes inefficient and no longer brings any real added value. PowerTune isn’t much help here either, but rather a kind of shackle, because the minimum frame rates already drop significantly despite higher maximum frame rates. You don’t achieve an increase in gaming performance anymore, but already get the opposite due to the visible jerks.
- 1 - Einführung und Übersicht
- 2 - Unboxing und Features
- 3 - Platine, Kühlsystem und Stromversorgung
- 4 - Taktraten und der Lethal Boost
- 5 - Takt und Leistungsaufnahme bei Vollast
- 6 - Takt und Leistungsaufnahme beim Gaming
- 7 - Temperaturen und Lüfterdrehzahlen
- 8 - Lautstärkevergleiche im Video
- 9 - Wir bauen ein Eyefinity-System
- 10 - Eyefinity 6 und Benchmarkergebnisse
- 11 - Eyefinity 4 und Benchmarkergebnisse
- 12 - Zusammenfassung und Fazit
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