M6800 Owners' Thread

Discussion in 'Dell Latitude, Vostro, and Precision' started by billxt95, Nov 1, 2013.

  1. TheQuentincc

    TheQuentincc Notebook Evangelist

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    The Quadro P4000 MXM I got is already working on my M6700, as for the GTX1080 mxm it's more like an experiment, it arrived broken and I tried to fix it but it doesn't work on my M6700, it might work on the M6800. If the 1080 work on linux it would be awesome.
    Also there is two revision of the M6800 motherboard ? one with LVDS and the other one with eDP ? it looks like there is also a board with both connector but only one soldered ?
     
  2. Aaron44126

    Aaron44126 Notebook Prophet

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    Yes, there is an LVDS motherboard and an eDP motherboard. Early on they used LVDS for all available panels, and after a year or so they switched everything over to eDP. There was no IPS display, 3D display, or 4K display option for the M6800 so no reason to have eDP available at launch. (Same for M4800, but it had two versions from the start because they did have a 1800p display.) You can see that they were thinking about it obviously (there is a place on the LVDS motherboard where the eDP port should go).

    AFAIK there is no other difference between the two motherboards, one should be a drop-in replacement for the other.
     
  3. TheQuentincc

    TheQuentincc Notebook Evangelist

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    Ok, and do you we know if the eDP board is 2 lanes or 4 lanes eDP ?
    The board with both connector are LVDS and the latter board with only one connector is only eDP ?
     
  4. Aaron44126

    Aaron44126 Notebook Prophet

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    The board with "two connector"... You mean this one?
    [​IMG]
    It has a spot for the eDP port, but the port is missing; that is the LVDS-only board. I haven't actually seen one with both LVDS and eDP.
    I don't know how many lanes the eDP board is.

    The eDP board actually has the eDP port where the LVDS port is in this one, and the "extra" unconnected port is totally missing.
    I haven't seen one with both connectors...
     
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  5. TheQuentincc

    TheQuentincc Notebook Evangelist

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    Yes I mean the one with both traces has only the LVDS port soldered and the board with only one traces and one port is eDP only
     
  6. bobmook

    bobmook Notebook Consultant

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    What I am curious about is how you got the P4000 to work on the M6700 ,,,,,,,, so far as I'm aware no one else has been able to successfully do so. It would be a great thing for our small community if we knew how to make a P4000 work ........
     
  7. Aaron44126

    Aaron44126 Notebook Prophet

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    I've chatted with him on this, basically he has found a vBIOS that works for booting Windows but has the limitation of not allowing the GPU to hit boost speeds.
     
  8. TheQuentincc

    TheQuentincc Notebook Evangelist

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    [​IMG]
    (this was on my LVDS, since I upgraded to 4k display which should gave a better result than using optimus)
    There is a little bit more, all Quadro P4000 mxm cannot boost higher than 1250MHz, which is a low frequency (pascal can easy go up to 1800MHz), that's my only complain with it, I tried some vbios modification (by hand) with no success, it's more powerfull than a 980M even with this low frequency, another great thing is that the Quadro P4000 consume "nothing", like 65W in game and 80W in the most stressfull furmark.
    I might also try desktop P4000 vbios but there a very few vbios out there, like 3 on techpowerup...
    We also have a Quadro P3000 vbios which is very very similar to the vbios of the P5000 we use on M6700/M6800 but the P3000 is also limited to 1250MHz, so it should perform between a 970M and a 980M.

    And it's not me that found the vbios but @RMSMajestic on this thread : http://forum.notebookreview.com/thr...tx-1070m-on-m6700.827595/page-4#post-10907776

    edit: I don't really like making a thread just because one card work with the M6700, I'm writing a thread about maxing out the M6700 so I will talk about the P4000 here
     
    Last edited: Sep 5, 2019
  9. TheQuentincc

    TheQuentincc Notebook Evangelist

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    So I received my M6800, it had a "black screen" issue where it wasn't able to boot at all (no bios access) due to bad bios, I reflashed both 8MB and 4MB file with a dump founded on the web and it work.
    I need to update the bios since it's only on the A06 bios, also I would like to know if there is any "unlocked" bios for the M6800 ? I was reading this thread but nothing more than a way to flash/read bios without external programmer : http://forum.notebookreview.com/threads/guide-dell-precision-m6800-m4800-sbios-mod.788481/

    What is the part number for nvidia gpu cooling ? Does a delta fan could help gpu temp on the M6800 ? I currently have delta fan for cpu and avc fan for cpu/gpu combo
     
  10. Aaron44126

    Aaron44126 Notebook Prophet

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    I believe in this system the "large" fan is for cooling the GPU and the "small" fan is for cooling the CPU? (Backwards from M6700)
    If you're going to put an NVIDIA GPU in then I wouldn't worry too much about it, or just go for whichever is quietest. When I had the P5000 I was not able to get it even close to thermal throttling. It would always hit the power limit first and stay below 80C.
     
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