Steam deck mag Safe external cooler for JSAUX backplate

Combining the best of both worlds of my already existing cooler designs for the Steam Deck.
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updated August 23, 2023

Description

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After designing and using  both of my existing non destructive cooler designs for the the Jsaux Backplate on my Steam deck I found the following  conspicuity's: 

1.)  I pretty much use the big cooler (https://www.printables.com/model/386265-steam-deck-steam-cooler-for-jsaux-transparent-shel) only when I play located at home or stationary in general ( as it needs to be connected by usb cable. It does the most effective cooling  so I use it mostly when I work with up to 22 watts on the deck,  thats pretty much impossible on battery as the battery does not hold up  and the deck will eventually turn off after only a short time. ( or even right away) 

2.) The much smaller (https://www.printables.com/model/403939-steam-deck-low-profile-oc-cooler-for-jsaux-transpa)battery driven cooler works fine in mobile use but as the cooling capacity is reduced by its size and  only features a small fan its not really up to the task on the long run to keep temps  as low as I wanted them too with power draws around the 20 watt mark. 

So my third approach in this case is also non destructive cooling solution using an  uncompromised heat sink, not missing any of the fin stack fins for a fully capable unthrottled heat Dissipation. Using a high quality 40mm Noctua fan that is  quiet and can move a lot of air. I also wanted an easy way to connect the fan to a power source and also disconnect it if I dont need it at all. 

I also wanted a design I can use with pretty much all TPU cases out there  other then with my first design that needed the deck to be used without one. 

So I came up with this design featuring the same 50x51mm heat sink as  my big cooler. 

Using a 1mm heat transfer pad with a very high thermal conductivity (thats is also responsible for the whole contraption to hold on the deck on itself) works flawless in all of my builds I am  using this so far. 

 This also is a non permanent cooler that can be easily taken off as long the thermal pad plays along and does not take damage. I pretty much leave it on as I havent put my deck into its case for several months now. 

by utilizing an external 5 volt power source and a magnetic power connecter its a breeze to attach it to the deck and also take it of again. 

As I also use a magnetic USB C power connector for my deck ( yes I am fully aware of the danger of it,  dont worry :), I combined both cable into one and I am having a blast so far. 

Things you need for this build: 

A 5 volt power source, can be a cheap  USB power brick or any other 5volt source for the fan to make use of.  

Magnetic connector: 

https://de.aliexpress.com/item/1005003853427502.html

Heat transfer pad: 

https://www.amazon.de/gp/aw/d/B084V6TZPQ/

Noctua fan: 

https://www.amazon.de/-/en/Noctua-NF-A4x10-Quiet-Premium-3-Pin/dp/B009NQLT0M/ref=sr_1_5

TPU Case ( any will do really as you need to cutout the area on any of them: 

https://www.amazon.de/Protective-Steam-Protector-Anti-Collision-Installation/dp/B0B19GP2X4/ref=sr_1_1_sspa

 

Some super glue to attach the fan frame to the heat sink frame, some wire for the magnetic pogo pin connector,  A sharp box cutter to cut out the frame for the heat sink in the tpu sleeve ( or whatever case you use) 

Use some double sided tape for the cable mount on the back. 

!!!IMPORTANT!!!

For this mod to work you need to prepare your Steam deck  with an internal non destructive thermal mod!, Check the video on the BOTTOM ( prerequisites)  of the page, without it this cooler will almost make no difference at all!! Start watching from 00:27

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