My custom M4800

[MELOCODI]

https://github.com/xCuri0/ReBARUEFI

 

Take a look here, but here is my word of advice, from my experience of course - this is a very nerve-wracking procedure, going back through my thread you can see that I made an external door entrance to access (dremel + metal file + velcro) BIOS chips using CH341A + clip, I probably flashed the BIOS around 80 times on my machine, it is very messy.

 

 

I will maybe try coreboot out once again next time, just to see a clearer picture, but it won't be daily driver worthy (coreboot repo for m4800&m6800 lacks audio fixes, no battery communication and lots of other things).

[SuperMG]

Hello, Cicichen made a 3 heatpipes M4800 heatsink for the newer RTX cards... How is that possible? By cutting the fan's plastic casing.

 

This would definitely handle 120W easily.

[MELOCODI]

1 hour ago, SuperMG said:

Hello, Cicichen made a 3 heatpipes M4800 heatsink for the newer RTX cards... How is that possible? By cutting the fan's plastic casing.

 

This would definitely handle 120W easily.

Interesting, show some pictures please

[SuperMG]

Needs to add the "spiky" dissipation plate on top of the heatsink and it'll be perfect. I don't see any adjustments with the RTX inductors, maybe he didn't do that yet.

[SuperMG]

On 4/24/2026 at 12:15 PM, MELOCODI said:

Interesting, show some pictures please

He updated the design again, he did every improvements. It costs 135USD to purchase.

 

The heatsink made the GPU lost like more than 20C degrees by going from 2 to 3 heatpipes with a 55W TDP GPU and it's easily compatible with 120W with adapted adjustments. 3 heatpipes is what a 110-120W GPU uses normally. (Can depend on the core dimensions as well)

[MELOCODI]

For now I am taming my 4060 using:
nvidia-smi -lgc 210,1620
nvidia-smi -lmc 210,8002

(JASON X-VSION said that I should try 1350 mHz clock speed, but I stopped at 1620, GPU doesn't go above 65W which is pretty comfortable. VRAM doesn't get toasty too). 

[SuperMG]

14 minutes ago, MELOCODI said:

For now I am taming my 4060 using:
nvidia-smi -lgc 210,1620
nvidia-smi -lmc 210,8002

(JASON X-VSION said that I should try 1350 mHz clock speed, but I stopped at 1620, GPU doesn't go above 65W which is pretty comfortable. VRAM doesn't get toasty too). 

Or you can get the 135USD, 3 heatpipes pure copper heatsink from Cicichen.

 

I wasn't successful with undervolting and downclocking an RTX 4080 150W so I preferred to get a better heatsink for it...

 

Mine M4800 heatsink is already shipped and I'm waiting. Also my backlight mod v2 package was lost during transit and I don't know if the manufacturer will remake new ones...

[MELOCODI]

26 minutes ago, SuperMG said:

Or you can get the 135USD, 3 heatpipes pure copper heatsink from Cicichen.

 

I wasn't successful with undervolting and downclocking an RTX 4080 150W so I preferred to get a better heatsink for it...

 

Mine M4800 heatsink is already shipped and I'm waiting. Also my backlight mod v2 package was lost during transit and I don't know if the manufacturer will remake new ones...

135 USD is too much, I'll better stick with solder, copper plates, spare Alienware heatsink, dremel, etc. I am curious to see what cicichen comes up with only to see the design he went with. Nah, I'll pass, already got one heatsink from him.

[SuperMG]

1 minute ago, MELOCODI said:

135 USD is too much, I'll better stick with solder, copper plates, spare Alienware heatsink, dremel, etc. I am curious to see what cicichen comes up with only to see the design he went with. Nah, I'll pass, already got one heatsink from him.

It'll be worth it! I'll test and if the temps are so good for my RTX 4070 then you should buy! It's a new design, adapted for the new RTX at 120W TDP, did you see the picture?