Dell Precision 7540 and 7740 Owner's Thread

Discussion in 'Dell Latitude, Vostro, and Precision' started by djdigitalhi, Aug 13, 2019.

  1. win32asmguy

    win32asmguy Moderator Moderator

    Reputations:
    907
    Messages:
    2,586
    Likes Received:
    1,308
    Trophy Points:
    181
  2. win32asmguy

    win32asmguy Moderator Moderator

    Reputations:
    907
    Messages:
    2,586
    Likes Received:
    1,308
    Trophy Points:
    181
    HD+ is 30 pin. So you can upgrade to 60hz FHD without replacing the cable. There technically is a 30-pin variant of the Chimei 120hz panel I use but I do not know if it would work. Personally, I would start with a FHD 60hz upgrade (easy to find and very inexpensive) and then find the parts for the 40-pin if you want better. I am still trying to find spare "hinge" parts so I can build a complete second screen housing that is easier to swap out if I need any warranty work done.
     
    supermoth likes this.
  3. supermoth

    supermoth Notebook Consultant

    Reputations:
    10
    Messages:
    212
    Likes Received:
    16
    Trophy Points:
    31
    Thanks for the feedback.
    I am helping my buddy to upgrade the lcd and I was a bit lost.
    Now if we get an AUO B173HAN01.x could be whatever revision or it has to be .3 rev?
    Also just to educate myself what are the other numbers/letters standing for?
     
  4. SRom

    SRom Notebook Enthusiast

    Reputations:
    0
    Messages:
    34
    Likes Received:
    6
    Trophy Points:
    16

    When I still had T1000 I have noticed the same thing. I thought that it seems that Dell buffed lower end cards a bit.
     
    henhoy likes this.
  5. richjh

    richjh Newbie

    Reputations:
    7
    Messages:
    9
    Likes Received:
    2
    Trophy Points:
    6
    So after a number of issues, returned RAM, and Dell having my laptop for a while, here's what I've figured out:

    The 7740 cannot actually take 3200MHz RAM.

    It pretends to, and with EXACTLY the right RAM - it does work. But stick anything else in and you quickly run into problems. I actually think it borders on false advertising to say it takes 3200MHz RAM.

    I've attached a picture from CPU-Z showing the original RAM in the machine:

    [​IMG]

    So while it is running at 3200MHz, even the RAM itself reports that it's DDR4-2666. It just has a special mode which allows it to run faster.

    I have tried several brands of 3200MHz RAM, and with all of them the laptop completely froze at some point during the first day of operation.

    I have since bought 2666MHz RAM - and been running for weeks with no issues at all.
     
  6. Baiano42

    Baiano42 Newbie

    Reputations:
    0
    Messages:
    5
    Likes Received:
    0
    Trophy Points:
    5
    Hi all,

    I have a Dell Precision 7740 with a NVidia Quadro RTX 5000 in it and I am trying to re-paste and re-pad it. I am thinking of Fujipoly for the pads and already have Thermal Grizzly Kryonaut for the paste. I am encountering a problem in that nowhere online is it posted the
    dimensions of the thermal pads for the computer. I have tried the user manual and calling tech support to no success. I looked up the heatsink, and all I could find were pictures. Based on what I could see, there seem to be different sized pads and different colors. Does anyone happen to know what thicknesses are present for the heatsink and GPU and what the different colors mean? Pictures attached:
    Side 1 -
    [​IMG]
    Side 2 -
    [​IMG]
     
    Last edited: Jan 6, 2021
  7. yrekabakery

    yrekabakery Notebook Virtuoso

    Reputations:
    1,218
    Messages:
    3,144
    Likes Received:
    3,125
    Trophy Points:
    331
    Use K5 Pro, then you won't have to worry about thermal pad thicknesses.
     
  8. Ionising_Radiation

    Ionising_Radiation ?v = ve*ln(m0/m1)

    Reputations:
    716
    Messages:
    3,044
    Likes Received:
    2,532
    Trophy Points:
    231
    No real need to re-pad: the Quadro RTX 5000 is power- and voltage-locked, so you aren't likely to run into thermal issues with the VRMs as your GPU will run within stock specs most of the time. As for paste, try not to use Kryonaut, as it isn't viscous enough for notebook applications. Phobya Nanogrease, Cooler Master MasterGel Maker Nano, and Gelid GC Extreme are some examples.
     
  9. supermoth

    supermoth Notebook Consultant

    Reputations:
    10
    Messages:
    212
    Likes Received:
    16
    Trophy Points:
    31
    All the pads that you have installed in the heatsink are manufactured by Laird Technologies for DELL.
    If you get into their webpage under thermal interface materials,and then into gap fillers you will find them.
    Most pads from Laird have a lifespan of around 2 years.Said that under my experience,they last longer.
    The real pain in the neck is to source them.
     
  10. win32asmguy

    win32asmguy Moderator Moderator

    Reputations:
    907
    Messages:
    2,586
    Likes Received:
    1,308
    Trophy Points:
    181
    If you pull the pads off you may find the dimensions etched into the heatsink. Here is a photo of the G5 SE heatsink, for example.
    g5seheatsink.jpg
     
Loading...

Share This Page