Real achievable clock rates and overclocking
The clock rates and the readout are arg fancy. I have coupled my own PDM with HWInfo64 for this purpose, because most tools do not render the frequencies correctly. AMD once speaks of the significantly lower GPU clock and once of the so-called GPU front-end clock, which should be something like an effective clock. Interestingly, the peaks of the Sapphire Radeon RX 7900 XT 20GB are a bit lower than those I measured with the reference card, but in total, the Sapphire Radeon RX 7900 XT 20GB is still a tad faster because it is more consistent. But it’s only about 2 percentage points, which also corresponds to the slightly increased power consumption.
GPU temperatures in the case
The differences are not as big as feared if you use a decent case. Because in the end, the card does not convert much more waste heat than the predecessor models. If you close the panel, the GPU temperature (Edge) increases by 2 to 3 Kelvin, the GDC hotspot increases by up to 5 Kelvin. This is all in the deep green area and looks better than AMD’s reference, even without Vapor-Chamber.
VRM temperatures in the housing
Since AMD has to monitor all voltage converters to fulfill the goal of a TBP estimation as well as possible, values for the temperatures drop here as well. These in turn can now also be read out via Sensor Loop. If we leave the green line with the GFX hotspot (GDC) aside, everything is roughly on par with the GPU edge temperature. That’s good.
Infrared measurements (heat flow analysis)
Let’s start with the gaming loop and we see that it is warmer underneath the base than in the GPU, which is not surprising. Sapphire has designed the fan control very reactively, which we will take a closer look at in the next chapter.
The temperatures increase a bit in the stress test, but the same applies here. Balancing act between cooling performance and fan noise.
- 1 - Einführung, technische Daten und Technologie
- 2 - Teardown: PCB und Komponenten
- 3 - Teardown: Kühler und De-Montage-Tips
- 4 - Summe Gaming-Performance WQHD (2560 x 1440)
- 5 - Summe Gaming-Performance Ultra-HD (3840 x 2160)
- 6 - Details: Leistungsaufnahme und Lastverteilung
- 7 - Lastspitzen, Kappung und Netzteilempfehlung
- 8 - Temperaturen, Taktraten und Infrarot-Analyse
- 9 - Lüfterkurven und Lautstärke
- 10 - Zusammenfassung, Fazit und Verlosung
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