R89 mods

[LawlessPPC]

Just a quick one to show what I've done in a few mins last night


All looks innocent enough but.....




Probably the worst application of thermal compound I've ever seen!!!!!! Great potential for shorting components out and thermal build up. Thermal compound should just be a smear to fill the tiny pits and imperfections of the heat sink and die so it gets total die surface area making a contact with the heat sink like this......


I also added some heatsinks to the ram and I'm ordering a 5v fan




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[Gormar]

Wow. I almost forgot how much termal grease (or rather termal pad) from factory there is. It looks almost revolting . Removing this was my first thing to do after buying this device.
I also added 5V 40mm fan on this radiator. Power can be taken from USB port pads on the motherboard.
One more thing. I have put small (5mm x 5mm x 10mm) radiator on PCU (ACT8846). It also gets quite hot.

Side note: Did I properly noticed that in vicinity of yours eMMC there are scratch marks? It came in this state from Beelink?

[LawlessPPC]

I think its a number 4 in permanent marker it was 1 of 10 beta boxes but the second I used it I new what nand they'd used and didn't bother with it I've always known it should be quick on paper spec wise but was gutted at what they'd done.

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[gefattern]

Hi LawlessPPC ,


Can you please upload Pictures of the Fan and how you did it.



Thanks

gefattern

[LawlessPPC]

Hi LawlessPPC ,


Can you please upload Pictures of the Fan and how you did it.



Thanks

gefattern

Not got one yet but will

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[gefattern]

Hi LawlessPPC ,

I know , if all is ready i mean.


nice Day

gefattern

[LawlessPPC]

Just picked fan up will fit tonight loads of empty USB headers on PCB to solder to

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[LawlessPPC]

Somehow I've killed SD slot when installing fan may try and solder a fresh one but really can't be arsed bit small for my crap skills !!!!!!!!;

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[gefattern]

Hi LawlessPPC ,

that's not nice , hope you can fix it , i press my Thumbs.


good luck


gefattern

[Gormar]

Somehow I've killed SD slot when installing fan may try and solder a fresh one but really can't be arsed bit small for my crap skills !!!!!!!!;

I almost fill guilty recommending to mount a fan on RK3288 SoC .

[ghanashyaml]

Somehow I've killed SD slot when installing fan

We accept the risk when we start modding any board 🙂 Maybe you can use a card reader via USB instead. On a side note, that's also the motivation for going for a new model tv box 😀

[ididmytime]

RAM does not need heatsinks, they are mainly for marketing purposes. Please don't take my word though as a quick Google search will confirm this.

Hope you get the SD slot working again.

[LawlessPPC]

RAM does not need heatsinks, they are mainly for marketing purposes. Please don't take my word though as a quick Google search will confirm this.

Hope you get the SD slot working again.

I'm well aware of that but if you up the voltage it helps

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[Gormar]

I'm well aware of that but if you up the voltage it helps

You can not easely modify DRAM voltage on Beelink RK3288 board (and similar) because it is limited in DTB settings. Check regulator #1. What's worse memory software voltage is binded with SoC I/O controller voltage (DCDC3 - regulator #3) and settings above 1.4V could damage it.
AFAIK DDR3 memory on this board always gets 1.25 times more than what software indicates for ACT8846 PMIC (DCDC1 output) because there is resistive voltage divider on feedback input (FB #1). Therefore when there is 1200000 mV (1.2V) set for regulator #1 memory VDD inputs gets 1.5V. For more specific information look here.

[LawlessPPC]

You can not easely modify DRAM voltage on Beelink RK3288 board (and similar) because it is limited in DTB settings. Check regulator #1. What's worse memory software voltage is binded with SoC I/O controller voltage (DCDC3 - regulator #3) and settings above 1.4V could damage it.
AFAIK DDR3 memory on this board always gets 1.25 times more than what software indicates for ACT8846 PMIC (DCDC1 output) because there is resistive voltage divider on feedback input (FB #1). Therefore when there is 1200000 mV (1.2V) set for regulator #1 memory VDD inputs gets 1.5V. For more specific information look here.

Someone else that knows his shit

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