Review on 📦 Smraza Raspberry Pi 4 Model B Case with Fan, Acrylic Enclosure, 4 Coolers, 5V 3A USB-C Power Adapter, USB Card Reader, 6ft Micro HDMI Cable, and 7.8in Micro HDMI to HDMI Adapter Cable for 4K Ultra HD by Eric Mueller

While this may not be the best case, it certainly does a good job of cooling the Raspberry. I'm attaching a comparative stress test chart for the 1.5GHz base frequency and the 2.15GHz overclocked version with `over_voltage=6` and `arm_freq=2147` (that's all for RPi4 [4GHz], the fan was on the 5V pin). I was a little pessimistic at first, but it looks like the case is pretty good at keeping the CPU below 60-65°C. The noise level (for a high-mode fan) is great, especially when using the RPi4 with a loud TV like mine. This can be a bit uncomfortable in a quiet room, but then you can just switch to low-fan mode and be happy with that.