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@Hqnicolas Take a chill pill dude. I am not trying to prove/disprove anything. I am simply suggesting that the board may indeed be of 8/64 config. Sometimes, due to screwed up u-boot, not all the RAM is reported correctly. And here, I can see that adding up the memory (3.8) and zram (1.9), it comes to around 6GB. Hence, I suspect the memory is still there, it's just not reported correctly because of the zram/swap thing. Removing the swap/zram completely may indeed show it to be 8GB. On your note of TV boxes being unreliable, I never refuted your claim. I agree about the unreliability. At the same time, I own two of these x88 pro20 boxes (8/128 and 4/32) and looking at the chips and the markings on the board, I have certain confidence that it would be an 8/64 indeed. And, I own a total of 4 tv boxes, and a total of 4 sbcs (2 raspberry pis, one orange pi 5 plus, 1 starfive vision V 2), so I know what to expect and how wild things are out in the tv box world. I am sure you also know better than to claim to be the final authority on declaring all tv boxes as "unreliable"

@MMorales I think your board may still be of the 8GB RAM/64 GB emmc config. Why don't you try installing the armbian image for station m2 from here: https://www.armbian.com/station-m2/ After flashing the image, change the fdtfile=rockchip/rk3566-firefly-roc-pc.dtb line in the boot/armbianEnv.txt file to fdtfile=rockchip/rk3566-box-demo.dtb And also remove or comment out the line overlay_prefix=rk35xx

@FuSan Cheers! Have fun with your device Do you mean which Armbian build I started with for my device? I started with Station M2 community builds (edge), because it is also a rk3566 device. These days I run Fedora on my box.

@FuSan So, you have kernel 6.1.x running on your Armbian install. The driver for RTL8821CS chip was added in version 6.3 or 6.4 in the mainline kernel. You can change to a kernel with version 6.6 or later. Try searching for 'linux-image-rockchip64' using apt search command and install that kernel. I usually prefer the edge kernels because I like to stay on the bleeding edge Then, also install 'armbian-firmware-full' because it has firmware blobs to enable both wifi and bt for 8821cs.

@FuSan Please share the output of the dmesg command just after you log in into Armbian. I recall that the swap configuration can be changed by editing the file /etc/default/armbian-zram-config. If you disable zram, then you will see almost 8GB ram in your htop output.

Hi @FuSan The latest version of Armbian will work just fine. The mainline dtb named rk3566-box-demo.dtb has pretty much everything working for a x88 pro 20 box (except BT and USB 2.0 port) I have attached the dtb file that I use (and its source dts file too, in case you want to have a look). This dtb enables the bluetooth to work and also USB 2.0 port. Try it out and let us know. rk3566-box-demo.dtb rk3566-box-demo.dts

Place this u-boot file file in the /boot directory on s905x3 devices. It should be able to boot the new Armbian images, without any other changes to any files. u-boot.ext