Review on Raspberry IUniker 30X30X7Mm Brushless RetroFlag by Danny Crowder

I installed this on my Pi4 and it seems to help with temperature control pretty well. I have an official Pi case, and this morning my Pi was idling at about 75 degrees and doing next to nothing. After adding the fan, it's now idle at around 53C on the 3V power pin. This only seems to work with the label up (Bang Up). The fan makes a grinding noise when blowing. It's too loud for me when operating on the 5V pin, although the temperature drops even more. I prefer the sound level at 3V which is almost imperceptible. I ended up drilling a circular pattern on the top and bottom of the Pi case with 91 small holes. The fan fitted perfectly into these existing holes so I didn't have to cut a large hole or anything. My spacing wasn't perfect, but at first glance it looks pretty good.