In past years, gamers would accept everything for a little more performance. Nowadays, users are more aware of their graphics card's fan noise and power consumption.
In order to properly test how much noise a card's fan emits, we use a Bruel & Kjaer 2236 sound-level meter (~$4,000). It has the measurement range and accuracy we are looking for.
The tested graphics card is installed in a system that does not emit any noise on its own, using a passive PSU, passive CPU cooler, passive cooling on the motherboard, and a solid state drive. Noise results of other cards on this page are measurements of the respective reference design.
This setup allows us to eliminate secondary noise sources and test only the video card. To be more compliant with standards like DIN 45635 (we are not claiming to be fully DIN 45635 certified), the measurement is conducted at a distance of 100 cm and 160 cm off the floor. Ambient background noise inside the room was well below 20 dBA for all measurements. Please note that the dBA scale is not linear but logarithmic. 40 dBA is not twice as loud as 20 dBA since a 6 dBA increase results in double the sound pressure. The human hearing perception is a bit different, and it is generally accepted that a 10 dBA increase doubles the perceived sound level. 3D load noise levels are tested with a stressful game, not with Furmark.
It's good to see that unlike the NVIDIA Founders Edition, EVGA added the fan-stop-in-idle feature on their card, which provides the perfect noise-free experience during desktop work, Internet browsing, and light gaming.
Gaming fan noise is a bit high, especially considering the massive cooler that's installed on the card. Sure, temperatures are super low at 64°C, but to me, this doesn't look balanced. As mentioned before, the OC BIOS runs the same clocks and power limit as the normal BIOS. The only difference is the fan curve, which makes the card even noisier and drops temperatures from only 64°C to 62°C. This seems to be a wasted opportunity... giving the "normal" BIOS a very quiet fan curve and keeping the aggressive fan curve on the OC BIOS would have ensured the card appeals to the low-noise crowd, too.
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