Am I missing something here?
I tried searching the forum for this. another post was linked but it’s not at all clear which part is which or where any of it is supposed to go.
I see like sticker sheets, could it be the graphene cooling? DIY a Graphene Cooling System for DevTerm
yes, this is the diagram I don’t understand. I have the copper foil. as far as I know there is no graphene sheet. there is also no heatsink pictured for “C” to be applied to as shown in the diagram.
The copper foil have the graphene integrated(grey side). On the cm4 adapter there is no space for a classic heatsink, the cm4 cpu touch the plastic back cover. For that the copper foil is the only heatsink that is supposed to use. The copper side on the cpu and the graphene side sticked on the plastic side. In my case the sticker side doesn’t sick and I don’t use it. In my case I cut a window in the plastic back cover to place on the cpu a copper plate.
That must be a CM4 specific heatsink, my A06 is a thin foil of copper with a gray backing.
Has anyone else had luck with the heatsink that ships with the CM4? I’d love to see some pictures from anyone who installed it using only the components it came with.
I originally bought a Devterm with the A06 and it came with a different, smaller heatsink. But I later got the CM4 adapter, and I recently managed to purchase a CM4 (8GB).
After a lot of exploration, I found that the little grey rectangle with the throwaway blue protector actually does have adhesive on one side. There’s a clear plastic sheet that’s easy to miss, but with some tweezers I managed to take it off and find the adhesive underneath. So I used that to stick it to the CPU.
But the larger, two sided coper+graphene sheet doesn’t seem to have any adhesive at all. And as others have mentioned, I’m afraid to just have a large copper sheet potentially shorting out the exposed electronics. I’m not even sure if it’s safe to place inside using my own double-sided tape to hold it against the case.
And I don’t want to modify my case. I feel like this should work as supplied. The documentation is rather poor, and I’m wondering if @AlexDuan, @guu, or anyone else could offer some advice. Thanks!
I cant be sure as i dont have a devterm to verify, but having worked with similar materials in the past it looks like the setup goes like this:
- Attach the graphene sheet to the copper sheet, the sheet should be centered (See note below)
- attach the copper/graphene assembly to the rear case with the copper facing towards the mainboard
- The thermal pad (the thick rubbery pad) goes over the CPU on the mainboard (if the pad is very large, cover as much area on the PCB as possible but make sure the CPU is covered and the memory if possible)
NOTE: it looks like one side of the copper sheet should be covered in adhesive and the copper sheet should be larger than the graphene one. The graphene should be applied to the center of the adhesive side so that when these sheets are applied to the rear of the case the adhesive from the copper overlap is how it stays in place. This should go directly over the core to make as much contact with the thermal pad as possible.
NOTE2: The thick rubbery thermal pad will deform to fit the available space, so if it seems a little too thick it should be fine. This material is designed as a thermally conductive gap-fill material for exactly this type of application.
NOTE3: the copper sheet should not touch any components directly as long as the thermal pad has been added, so no need to worry.
NOTE4: avoid directly touching the thermal pad as much as possible, the oils from your skin can degrade the material over time.
NOTE5: make sure you remove any protective plastic layers from all of these materials.
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