NVIDIA GeForce GTX 780 Ti Reviewccokeman - November 7, 2013
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NVIDIA GeForce GTX 780 Ti Testing:
While it's important to test the GTX 780 Ti and judge it objectively, it's also important to compare it to its competitors — especially its main competitor, the AMD R9 290X. If you read our review on the AMD R9 290X, then you'd know that it has an "Uber" fan mode and a "Quiet" fan mode. While in this Quiet mode, the fan will only reach a maximum of 40% in order to be as quiet as possible, regardless of the amount of heat produced. Utilizing a 28nm core with over six billion transistors, the R9 290X core is huge and needs to be cooled. As we saw in our temperature testing, the R9 290X reaches 94 °C, just under the 95 °C thermal limit of the card. At this point something has to give if there is no way to keep the card cool with a higher fan speed. What gives are the clock speeds. Once the heat builds up sufficiently that the airflow of the fan is not enough to keep the core from overheating, it dynamically reduces the core clock speeds down as low as an observed 669MHz to maintain the thermal threshold. As the thermals improve, so do the core clock speeds.
Knowing that the latest architecture from AMD is going to dynamically reduce clock speeds when run in Quiet mode, we have implemented an extended gaming test that heats up each card so any throttling of clock speeds will have an impact on performance. We saw the R9 290X drop as low as 669MHz, so we'll run the same test here on the GTX 780 Ti.
Seeing how the clock speed drops dynamically in Quiet mode, we had to revisit our testing and verify Uber mode was enabled to show the expected performance characteristics in the main testing. But we decided to show here how the R9 290X performs when run in Quiet mode and how that option compares to Uber mode, while comparing this directly with the GTX 780 and now GTX 780 Ti. To do so we heated up all the cards while in a game for five minutes before a benchmark scenario was run. Resolutions tested are 1920x1080 and 5760x1080. We are using a sampling of our normal benchmark suite, but have included Batman: Arkham Origins as a replacement for Batman: Arkham City. The settings used mirror those in our benchmark suite tests for a direct comparison.
Batman: Arkham Origins:
Far Cry 3:
Metro: Last Light:
At 1920x1080, the GTX 780 Ti beats out the R9 290X in every game while it's in Quiet mode and all but one while in Uber mode. At 5760x1080, the R9 290X still has an advantage in some games.