Dell Precision M6700 RTX Ampère and Ada Lovelace issues

[SuperMG]

Hello people.

 

I managed to get the RTX 4080 to work on the M6800 eDP UEFI version. No Haswell TDP bugs, displays on eDP and can do 154W max.

 

The same GPU worked on the Clevo P570WM eDP 120Hz 3D laptop (UEFI, 2012, Ivy bridge)

 

However, I tried to use this GPU (with the backlight mod cable) on the Dell Precision M6700 with the eDP 120Hz screen and... It doesn't work.

 

eDP cable is plugged with the backlight mod and the computer doesn't boot

 

eDP cable is unplugged with the backlight mod cable computer doesn't boot

 

HDMI is plugged, eDP cable is unplugged with the backlight mod and the computer boots to the bios (external display)

 

The RTX 4080 has eDP on DP_D. The M6700 has eDP set on DP_D. The M6800 also has eDP on DP_D.

 

So what's the difference between the M6700 and M6800? Why it doesn't work?

 

The RTX 3000 from HP works on both laptops. So the maximum I can do for the M6700 is RTX Turing from HP?

 

Any help? 

[Annihilator]

different eDP ports? 

[SuperMG]

12 minutes ago, Annihilator said:

different eDP ports? 

No this is wrong.

 

Both are eDP, same connectors.

 

It's eDP on DP_D for both, the same as on the RTX 3000 from HP.

[Annihilator]

trying a bios on the 4080 with less PL maybe? possible the m4700 cant deliver enough power for the whole system?

[SuperMG]

1 hour ago, Annihilator said:

trying a bios on the 4080 with less PL maybe? possible the m4700 cant deliver enough power for the whole system?

No it's not... It doesn't use 100% TDP on the BIOS. This is also wrong. And we're talking about the M6700.

 

Also no other VBIOS are compatible with this GPU.