Review on Noctua Bearing NF B9 Redux 1600 PWM by Nick Winnett

I have an old refurbished commercial HP box that still works. This is a tank. I recently upgraded the processor to a used $16 95w quad core Phenom processor with 8GB RAM. The old box will probably be used as a media streamer for another 10 years. However, the PS fan was very noisy when I increased its speed to keep up with the HOT Phenom chip. Being HP and completely proprietary I couldn't just replace PS. This fan solved the problem and the box maintains a stable temperature of 40°C when streaming video and only 31°C in standby mode. About 10 degrees lower than before and much quieter. I hardly notice the fan noise under my desk. One catch is that the old motherboard from 2006 or so doesn't detect the PWM fan on startup and warns me, but the fan is definitely working fine.