P165-B Heatsink

Nice heat-sink. I used some generic 'white' heat sink paste on the Raspberry Pi 4 B and this heat sink lowered the CPU temperature by 10 degrees C. So it works well. It is well made and has a nice finish. I have the PI mounted to the backside of the display, and I was able to drill out the threads of the heat-sink and use the supplied 12mm screws to attach the heat-sink to the existing display standoffs. This is really nice as many of the heat-sinks need much longer screws to mount this way. But here the supplied screws worked. See the picture below that shows the supplied screws being used to secure the RP-4 B to an existing Display Mount. Bottom line: I would buy this again.

Works great. I wanted a slim heat sink option to fit inside my RasPad 3 enclosure. I got it to fit by taking off the included fan on the heat sink and replacing it with the fan from my RasPad enclosure. The RasPad fan is large so you wont get all 4 screws in. I just tightened one screw in making the fan face the heat sink and it held fine. The Pi gets much better cooling compared to previous setup. One tricky part with the RasPad is getting the small accelerometer shim back on the GPIO pins for the auto rotate screen feature. I just soldered the shim to some 2x3 female pin headers to make it hold solid. If you use header pins the case fan won’t fit in its normal spot. If you move it into the heat sink like I did you won’t have a problem. If you get the shim on without header pins you can bend the GPIO pins to help retain it in place, but it was hard. I wanted a more solid connection.

Affordable cooling protector that was easy to use.

This heatsink and fan combo keeps the Raspberry Pi cool even when I run benchmarks that put a 100% full load on the quad-core CPU. At full load the temperature of the CPU is 49 degrees C (120.2 degrees F) after 20 minutes of run time. If you are using a HAT on the GPIO pins the heatsink and fan are low profile enough to attach the HAT without a GPIO Extender Header. Picking the correct size standoffs to attach to the heatsink for supporting the HAT takes some trial and error. The kit does come with different size (height) standoffs so you should be able to find a size that works with your HAT. Since the fan is small it does make more noise than larger fans. It is not loud, just louder than bigger fans.

Heatsink went on easy, fits well and reduced temps quite a bit (I applied thermal paste). Fan unfortunately got extremely loud (buzzing/grinding noise) after only three days of use, had to unplug it.

Impressive heat sink for my pi 4 picoreplayer. I needed one that would allow me to add a digi hat and this one worked great. It lowered the temp by 10 degrees inside a vented plastic case, the heatsink was also 5 degrees cooler than using that same vented case with a fan. Thus, I could cool my pi 4, keep the case I like and eliminate the fan. In my case without fan, the temp stays right at 50 ° C, YMMV. I did use thermal grease and it would have been nice if they had included a small dab with the heatsink.

I run my Raspi 4 as a file server and DNS ad blocker 24/7. I took off the fan that this head sink comes with and mounted the whole thing in a wooden box with a more powerful pull fan and single vent. Works great for passive cooling. I used graphite cooling pads so it touches the ram, Wifi chip, USB bus, and CPU. It doesn't get above 48 C. I needed a riser so i could still attach a 40 pin ribbon cable to the GPIO. Its a tight fit but you can get a ribbon cable in there after you file down the sides a little. I also have the taller version of this heat sink but somehow this one seems to work better.

The installation was straightforward and hassle-free. The heatsink kit came with thermal adhesive pads, making it easy to securely attach the heatsinks to the main processor and other heat-sensitive components on the Raspberry Pi board. No additional tools or technical expertise were required, which is a big plus for users of all experience levels.