Fan curve and operating noise (“volume”)
Now we come to what is automatically generated when the waste heat is dissipated: various fan noises. As always, the measurements in the measurement chamber are a bit tricky, because you can’t measure anything through the closed side window. That’s why I switched off the case fans and set the AiO to the absolute minimum. Then they are drowned out in the noise carpet of the Sapphire Radeon RX 7900 GRE Nitro 16 GB. Normally I do this with a silent system in the chamber, but I didn’t want to deprive you of the tiny coil beeping or the slightly fluctuating regulation of the card.
Let’s first look at the fan curves and we’ll understand why I couldn’t measure this with an adapted fan speed in the chamber. Because here again we see an extremely jittery curve that reacts very nervously to all load changes. The manufacturer could make improvements here, because you can definitely notice it
But what does the measurement show for the Sapphire Radeon RX 7900 GRE Nitro GB? The frequency analysis shows how the speed of the fan changes slightly (motor peak in the low frequency range), so that the operating noise is a from-to story, which is an excellent 29.6 dB(A) in the middle of the long-term measurement (SPL Slow). That really is ultra-quiet.
Coil noises: “Coil whining” and audio sample
However, there is one point we still need to talk about and that is the annoying coil whining. I already wrote about it in the measurement of the load peaks that the cards usually perform an extremely jittery dance of joy, which you can then also hear. With the Nitro, almost nothing was actually audible, which proves once again that you can win the coil lottery. I have an audio sample from my chamber for you, but I had to amplify it so that you can hear anything at all.
- 1 - Introduction, technical data and technology
- 2 - Test s4etup and methods
- 3 - Teardown: PCB and components
- 4 - Teardown: cooler and cleaning tips
- 5 - Teardown: material analysis
- 6 - Gaming-Performance Full-HD (1920 x 1080)
- 7 - Gaming-Performance WQHD (2560 x 1440)
- 8 - Gaming-Performance Ultra-HD (3840 x 2160)
- 9 - Gaming-Performance DLSS / FSR (3840 x 2160)
- 10 - Gaming-Performance FSR3 Frame Generation (3840 x 2160)
- 11 - Latenzen
- 12 - Power consumption and balancing
- 13 - Transients and PSU recommendation
- 14 - Temperatures, IR analysis and clock rate / OC
- 15 - Fan curves, noise and audio sample
- 16 - Summary and conclusion
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