No fan is silent at full speed. That's the crux here.
You can, however, lower a non-PWM fan's speed with voltage control if your motherboard/fan controller supports it; ableit they won't be able to go as low in speed as a PWM fan. This could be a way to lower your current sound levels without replacing fans.
You can, however, lower a non-PWM fan's speed with voltage control if your motherboard/fan controller supports it; ableit they won't be able to go as low in speed as a PWM fan. This could be a way to lower your current sound levels without replacing fans.