silent fan

Hello. I have an older PC setup with 1150 Haswell Pentium G3250 on. It works well for things I do, but the stock fan is noisy and it makes me mad. So I started to look on less noisy fans and I found ARCTIC Alpine 12 Passive, that has no fan and thus makes zero noise. However, the producer states...

1. Should I go with be-quiet pure wings 2, or noctua nf-a12 for absolute silence? Or are there any better absolutely silent fans that move a bit of air? I have a mini itx case and I just want to help out my 2070 super with some airflow. I have 25mm of clearance between the video card and the...