Temperature And Noise Results
We start with the direct relationship between power consumption and temperature. Unlike its larger sibling, the Nvidia GeForce GTX 1070 Founders Edition doesn’t have a vapor chamber as part of its cooling solution due to cost-cutting measures. Unfortunately, this fact is reflected in our results. The smaller and more efficient graphics card ends up running at higher temperatures.
Both Founders Edition cards hit their thermal ceilings, capping maximum power consumption. This results in a fairly straight line that doesn't allow us to show each card's limit. We need another set of measurements to illustrate what’s going on.
The following graph shows the ratio of temperature and clock rate. It tells us two things. First, each Founders Edition card demonstrates a clear bend in its curve upon hitting the temperature limit. Second, we see what a good cooling solution that doesn’t hold back its graphics card looks like.
This section gets more complicated because all of our results were collected in a closed case so far. However, we can’t measure noise like that. So we moved the graphics cards to our audio test station after meticulously recording fan speeds during the preceding benchmarks. We then set each card's fan to the exact same RPM for our audio measurements. The voltage converter noise was below our lower threshold, so we could skip them without really affecting the outcomes.
The results for Nvidia's GeForce GTX 1080 Founders Edition are similar to, but a little different from our launch review. That's a result of higher temperatures in the closed PC case. Once again, we start with the ratio of noise and power consumption.
There’s a huge difference between cards with radial fans and those with several axial fans. Of course, each vendor's fan control curve affects the outcome as well.
MSI is on the conservative side. Its fans only really kick in under high power consumption, and our acoustic readings benefit as a result. Conversely, the two Founders Edition cards always make their presence known, and they can be made out clearly among the other components with high power consumption.
Once frequency is thrown into the mix, we see a similar picture as before. This includes the same bent curve where the Founders Edition cards run into their thermal limit. We wouldn’t call any of the boards in our comparison annoying-sounding, but MSI does a great job with its three contenders and is the clear winner.
So what does all of this data tell us? First, Pascal’s CUDA cores perform exactly like Maxwell’s. They’re just faster and more efficient. Consequently, the Pascal-based cards post better performance numbers at lower power consumption.
Second, overclocking only makes sense in small doses, if at all. The GeForce GTX 1080 is held back by its slow memory, whereas the 1070 turns out to have the higher memory throughput per shader. Still, both Pascal-based graphics cards are definitely worth a look, and the GeForce GTX 1070 may become a worthy successor to the popular GTX 970 once its prices fall to more reasonable levels and availability improves.
The GeForce GTX 1080 might end up sharing the 980’s fate: it’s just too expensive for the modest performance gain you get compared to GTX 1070. It looks more like a placeholder until the next Titan or GeForce GTX 1080 Ti emerges.
We’re looking forward to what else the add-in partners have in store for us. We’re certain that their R&D departments will find a way around Nvidia’s rules. After all, a full 16W at idle’ is ridiculously high in today’s market.
We received feedback and additional information since the original publication of this article. Unfortunately, the press samples and retail examples of MSI's GeForce GTX 1070 Gaming X 8G and GeForce GTX 1080 Gaming X 8G are slightly different. The press boards default to the OC preset, whereas the retail cards default to the gaming preset with a lower base and GPU Boost clock rate setting.
MSI confirmed all of this and pointed toward the included software. At 20 MHz, the base and GPU Boost frequency differences are not large, but pulling these kind of stunts isn’t fair to customers or the competition. For instance, Gigabyte uses the gaming preset and offers any additional overclocking via software.
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