The Noctua Black Adapter is attached to the NH D9B SE2 which reduces fan speeds to 1,300 rpm and a Noctua rated 13.1 dBa.
When using the low noise adapter processor temperatures rise by about 9-10c and system temperatures also increase slightly due to the reduced airflow which helps the chassis and heatsink driven Sapphire HD5670 to cool. They are still within safe parameters however.
Noise levels drop to 16.8 – this is extremely difficult to record as our breathing can even affect the result. We held our breath and measured the noise levels in the room.