Changes

==OverviewForeword==Update Notification:  1. The cooling fan of P165 embedded heatsink has been updated with '''2507 cooling fan''' at July 2020, the old version uses the 2506 cooling fan. 2. The P165 embedded heatsink has been updated to attach thermal tape at '''both CPU and RAM''' at April 2020, the first version just need to attach proper thermal tape at RAM. Geekworm design this Raspberry Pi 4 Model B embedded armor aluminum alloy heatsink to slove Pi 4 excessive heat generation problem when use Raspberry Pi 4 Model B with its expansion board. This heatsink can also be used with a cooling fan above. 

* 1. After the Raspberry Pi 4 was released, we found that the heat generation of Pi 4 also increased greatly with its performance. We have encountered many times that Pi 4 crashed due to excessive heat generation. This problem can be satisfactorily solved by use the Raspberry Pi 4 armor case with other Pi 4 external expansion board.* 2. At the same time, we found that various types of Raspberry Pi 4 expansion boards such as DAC+, UPS HAT, or various LCDs on the market also encountered excessive heat generation when used on Pi 4. So we try to solve this problem.* 3. We refer to the design of Raspberry Pi 4 armor case and simplified the design , so there is the birth of this Embedded Armor Aluminum Alloy Heatsink Radiator. '''Why is it compatible with the use of pi 4 expansion boards?''' # The P165(P165-A) Embedded Armor Aluminum Alloy Heatsink Radiator is 7mm high (designed with negative tolerance) and is equipped with M2.5*5+5 copper spacers; so the total height is 12mm, which can support most of Raspberry Pi 4 expansion boards(not support PoE expansion board); if you use expansion board with other height, you only need to replace the copper spacers with the right height. (If you need a special height copper spacers, please contact us.)# The raspberry pi hat positioning hole has internal thread for easy fixing from above or below; Compared to the raspberry pi PCB, the entire heat sink shrinks inward by 0.5 mm.

The raspberry pi hat positioning hole has internal thread for easy fixing ==Update History==# On November 11th, 2020, based on customer feedback, a slightly thicker version was released, which is 11mm thickness. It supports 3010 cooling fan, will have a better heat dissipation function and compatible with PoE expansion board. This new embedded heatsink is named P165-B, while the old radiator will be renamed P165-A from above or below;P165.Compared # On July 2020, update the cooling fan of P165 embedded radiator from 2506 to 2507.# On April 10th, 2020, the raspberry pi PCBP165 embedded heatsink has been updated to attach thermal tape at both CPU and RAM at April 2020, the entire first version just need to attach proper thermal tape at RAM.# On September 29, 2019, Geekworm release this Raspberry Pi 4 Model B embedded aluminum heatsink to help slove Pi 4 excessive heat sink shrinks inward by 0generation problem.5 mmThis heatsink, which called P165, can also be used with a cooling fan above.

* Only supports Raspberry Pi 4 Model B; * Supports to cooling down the Raspberry Pi 4 board when using the Pi 4 expansion board;(Do not support Please choose P165-B if you need to use it with PoE expansion boardsboard) ;* Equipped with a variety of screws and copper spacers;(The screw packs of P165-A1 and P165-B are different); * Raspberry Pi HAT positioning hole is M2.5 internal thread; (this design is convenient to fix) ;* Supports the fan installation of 25mm fans; Cooling fan can be added when the heat dissipation of a single aluminum heat sink is not enough, so that all heat dissipation problems can be solved. * The fan equipped with the heatsink is the same fan as the official POE expansion board;