My custom M4800

[Annihilator]

On 12/24/2025 at 2:29 AM, MELOCODI said:

I advise everyone to NOT get i7 4980HQ, as impressive as this CPU looks with it is monstrous L4 Cache it is not worth the risk, it will either die on it's own or you will kill it with an excessive mounting pressure as it has a higher profile than stock rPGA946b CPUs. 

 

 

r u sure is higher? bcs the 4980hq itself is 1.65mm + the PGA package, n a native pga CPU is 4.7mm, when its higher maybe using washers will help?

n when i find a 2x8GB kit of 2133 mem, i will give the 4980HQ a try, when it only last a year, its ok, so it will cost around 5 bucks/month, less then every streaming abo 😄 

[Fra]

Hi! Does Crystalwell cpus work out of the box or do they requires coreboot? I am trying an I7-4870HQ...

[MELOCODI]

9 hours ago, Fra said:

Hi! Does Crystalwell cpus work out of the box or do they requires coreboot? I am trying an I7-4870HQ...

They should work fine right out of the box

[SuperMG]

Hello. I'm going to buy a cheap M4800 with eDP motherboard + LP156WF6 eDP 1.3 display and use it with an RTX 4070 MXM from X-Vsion (good VBIOS, it has eDP enabled on D, needs backlight cable mod).

 

I do need to get a custom heatsink for the 120W of power. Two heatpipes could work for the M4800, since the OEM one has one fat heatpipe.

 

I already have a M6800 with custom heatsink for the RTX 4080 in eDP with backlight mod (needs EDID override for the OS because bad vbios) and 7720 with 4070 MXM.

 

 

[MELOCODI]

3 hours ago, SuperMG said:

Hello. I'm going to buy a cheap M4800 with eDP motherboard + LP156WF6 eDP 1.3 display and use it with an RTX 4070 MXM from X-Vsion (good VBIOS, it has eDP enabled on D, needs backlight cable mod).

 

I do need to get a custom heatsink for the 120W of power. Two heatpipes could work for the M4800, since the OEM one has one fat heatpipe.

 

I already have a M6800 with custom heatsink for the RTX 4080 in eDP with backlight mod (needs EDID override for the OS because bad vbios) and 7720 with 4070 MXM.

 

 

I hope it works out, 4060 didn't work in my case, still have no clue....

[SuperMG]

7 minutes ago, MELOCODI said:

I hope it works out, 4060 didn't work in my case, still have no clue....

Because you didn't have the backlight mod cable for eDP and @Nizmeïsterwas able to use his RTX 4060 MXM in the M4800 eDP but how did you cool it?

[MELOCODI]

2 minutes ago, SuperMG said:

Because you didn't have the backlight mod cable for eDP and @Nizmeïsterwas able to use his RTX 4060 MXM in the M4800 eDP but how did you cool it?

I am not sure if it is the case, because it doesn't show up in the system even when iGPU is enabled

[SuperMG]

5 minutes ago, MELOCODI said:

I am not sure if it is the case, because it doesn't show up in the system even when iGPU is enabled

I got the Ada cards to work in M6700 eDP UEFI and M6800 eDP. M4800 uses the same BIOS type as the M6800 (same NVRAM variables), so it should 100% work.

 

These cards don't work in LVDS unless you use Intel Optimus (iGPU + Nvidia).

[MELOCODI]

Just now, SuperMG said:

I got the Ada cards to work in M6700 eDP UEFI and M6800 eDP. M4800 uses the same BIOS type as the M6800 (same NVRAM variables), so it should 100% work.

 

These cards don't work in LVDS unless you use Intel Optimus (iGPU + Nvidia).

I use an EDP LA-9772p motherboard and tried both restoring the original BIOS (because mine is modded, I have unlocked the SPD write + ReBAR) and also tried CoreBoot, it just doesn't show up for some reason... Quadro T1000 works perfectly fine though.. I know about the backlight cable mod too, but shouldn't it at least show up with Optimus on? Correct me if I am wrong. If disabling Optimus + having a backlight mod lets these old M6x00 & M4x00 work with newer GPUs then I am shocked... 

With T1000 disabling optimus results in a black screen (ofc, because I didn't use the edp mod), but laptop actually works.
Doing so with 4060 results in a reboot after I apply the settings and in around 5 seconds laptop just shuts down, turns Optimus back on (by itself) and 4060 is not even visible in the system....

[SuperMG]

3 minutes ago, MELOCODI said:

I use an EDP LA-9772p motherboard and tried both restoring the original BIOS (because mine is modded, I have unlocked the SPD write + ReBAR) and also tried CoreBoot, it just doesn't show up for some reason... Quadro T1000 works perfectly fine though.. I know about the backlight cable mod too, but shouldn't it at least show up with Optimus on? Correct me if I am wrong. If disabling Optimus + having a backlight mod lets these old M6x00 & M4x00 work with newer GPUs then I am shocked... 

With T1000 disabling optimus results in a black screen (ofc, because I didn't use the edp mod), but laptop actually works.
Doing so with 4060 results in a reboot after I apply the settings and in around 5 seconds laptop just shuts down, turns Optimus back on (by itself) and 4060 is not even visible in the system....

You maybe got a broken RTX 4060. Did you send it to repair? Yes your T1000 is from ADLINK, it needs the backlight mod cable to display in eDP.

[MELOCODI]

Just now, SuperMG said:

You maybe got a broken RTX 4060. Did you send it to repair? Yes your T1000 is from ADLINK, it needs the backlight mod cable to display in eDP.

Nope... my dumb ass thought that maybe there is something going on with the laptop itself... I bought it back in January 2025, I am not sure if they are even going to help me with this anymore. I wonder if this GPU can even be diagnosed to be honest..

[SuperMG]

23 minutes ago, MELOCODI said:

Nope... my dumb ass thought that maybe there is something going on with the laptop itself... I bought it back in January 2025, I am not sure if they are even going to help me with this anymore. I wonder if this GPU can even be diagnosed to be honest..

Because @Nizmeïsterbought a backlight mod cable from me and the 4060 worked on his laptop. It even worked in Intel Optimus on his MSI GT60 but his laptop EC's fan didn't work... Well the EC on the M4800/M6800 work with the new RTX.

 

You have a DOA card. X-Vsion can repair your GPU, I had my 3080 fixed because of a short-circuit from a screw.

 

Also, Did you get a custom heatsink for the M4800 for the GPU?

[MELOCODI]

4 minutes ago, SuperMG said:

Because @Nizmeïsterbought a backlight mod cable from me and the 4060 worked on his laptop. It even worked in Intel Optimus on his MSI GT60 but his laptop EC's fan didn't work... Well the EC on the M4800/M6800 work with the new RTX.

 

You have a DOA card. X-Vsion can repair your GPU, I had my 3080 fixed because of a short-circuit from a screw.

 

Also, Did you get a custom heatsink for the M4800 for the GPU?

Yep, from cicichen, didn't really gain much, so I'll probably try to tame the GPU then.. if XVSION can really fix it, then I am gonna speak with them ASAP

[SuperMG]

Just now, MELOCODI said:

Yep, from cicichen, didn't really gain much, so I'll probably try to tame the GPU then.. if XVSION can really fix it, then I am gonna speak with them ASAP

The heatsink is a dual heatpipes one?

[MELOCODI]

2 minutes ago, SuperMG said:

The heatsink is a dual heatpipes one?

M4800 GPU heatsink only comes with one heatpipe by default unless modded somehow

[SuperMG]

12 minutes ago, MELOCODI said:

M4800 GPU heatsink only comes with one heatpipe by default unless modded somehow

I know but did he get the dual heatpipes custom one?

[MELOCODI]

4 minutes ago, SuperMG said:

I know but did he get the dual heatpipes custom one?

Nope

[SuperMG]

27 minutes ago, MELOCODI said:

Nope

Okay I'll ask cicichen about one