Precision 7530 & Precision 7730 owner's thread

Discussion in 'Dell Latitude, Vostro, and Precision' started by Aaron44126, Jun 27, 2018.

  1. kittenlips

    kittenlips Notebook Geek

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    @DerMarkus when I connect to an external display via HDMI the PCH temp is pretty much the same as I showed in screenshot above, though sometimes goes up to 50 C. Fan RPM is usually 0 and occasionally turn on and run at approx 2300 RPM (which is barely audible).

    If I remember correctly from earlier in this thread, plugging in an external display via DP makes PCH go slightly up but much less than the TB3 ports which for some reason on 7530/7730 cause PCH temps to go up to 68-72 C and then fans are pretty much always on.
     
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  2. Aaron44126

    Aaron44126 Notebook Prophet

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    Manual fan control

    I've been doing work to make manual fan control possible and as seamless as reasonable. Progress has been happening in this thread (http://forum.notebookreview.com/thr...ol-fans-on-dell-laptops-under-windows.805317/) I've been working with my Precision M6700 for the past few days, but I have just confirmed that the same solution works on the Precision 7530.

    Current status:
    * I've produced a command-line tool which can tell the EC to let go of fan control; this relies on a driver produced by someone else which is the subject of the very first post in that thread
    * I've signed the driver but due to Microsoft's restrictions on driver signatures, you must put in a registry key to allow it to be loaded if UEFI secure boot is enabled
    (You still do not have to enable test signing mode or anything like that)
    * Once the EC has let go of fan control, SpeedFan can manage the fans; you can set up your own temperature thresholds for fan behavior

    Also, another member is working with the author of Hwinfo64, and it looks like native support for this solution will be added there.

    Downside:
    With the EC not controlling the fans, the control that is available is not as granular. There are only three fan levels that can be used, 0% (0 RPM), 50% (≈2000 RPM), and 100% (≈4200 RPM). Note that the EC is able to push the fans up to around 4800 RPM which is not possible here.

    I'm going to have a detailed write-up on how to set this up later this week but in the meantime I wanted to post here in case anyone wants to mess with it.
     
  3. DerMarkus

    DerMarkus Notebook Geek

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    Really great news ! I am waiting for additional info :)
     
  4. Aaron44126

    Aaron44126 Notebook Prophet

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  5. dafunk60

    dafunk60 Notebook Consultant

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    Has anyone here received a decent 4k non touch screen in their 7730?

    I purchased two systems & both have an issue where there are inconsistencies in color / brightness along the edge of the screen. The issue is similar to that in the post I quote below but I don't think it's the bezel pinching the panel but damaged or defective panels.
    Dell replaced the original systems and the two replacements (systems 3 & 4) had the same issue.
    Dell replaced them again & the replacements (systems 5 & 6) had the issue.
    Dell replaced them again & the replacements (systems 7 & 8) had this issue.
    Dell then sent a tech out with a replacement display panel & out of the box, before the front bezel was even applied the replacement panel had the same issue. This leads me to believe that this is not an issue with the bezel pinching the panel.

    Dell then had me send both systems (systems 7 & 8) to depot repair. When returned both systems still had the back light bleed issue. One was covered with some sort of grey greasy fingerprints (looks like thermal paste maybe). The other has scuffs on the screen, looks like some one got something on the display then scrubbed it off with a dirty rag. There is also adhesive along the bottom of the panel. Both were covered with dirt & dust.

    I'm still working with dell to resolve the issues and am waiting for engineering to decide if these displays are acceptable or not. Everyone at Dell has been professional & eager to help, but it's been nearly 3 months & I still haven't received a single laptop with an acceptable display & they don't seem able to provide a replacement panel that doesn't have the same issue. I have two 7 year old M6600's and they still have better color consistency than any of the 7730's I've received.

    I'm wondering if I should just ask for a refund at this point & look for something else. If the rest of the laptop didn't suite my needs so well I would have gone that route two months ago. I would really like to stay with the 7730 but these displays are horrible.

    If you've purchased a 7730 with a 4k panel and wouldn't mind taking a moment, please look at the attached 4k-black.png image in full screen & post your findings. I'm curious if others have similar color inconsistencies around the edge of the screen as in the quoted image below or if I've just run into a batch of bad panels.

    Thanks!

    Edit:
    This post also illustrates what I am seeing on all these systems:
     

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    Last edited: Jan 21, 2019
  6. kittenlips

    kittenlips Notebook Geek

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    Looks like regular bezel pinching to me. Seems like with these new 7530/7730 during assembly they screw bezels on too tight for these particular panel models and lots come with some backlight bleed spots.
     
  7. dafunk60

    dafunk60 Notebook Consultant

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    That's exactly what I thought until they sent a tech with a new panel & it had the same issue before being attached to the back of the lid & front bezel put in place. I'm really just curious if I should expect any better from these displays or if it would be best for me to move on at this point. I've seen 9 panels in 8 different machines & all are unacceptable for any graphics / photo / video work.
     
  8. David11754

    David11754 Notebook Enthusiast

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    I totally agree with you. The 4K screen on my P7530 is just disappointing.

    Two weeks age, I asked Dell to change my screen because of multiple dead pixels and for what I described as a "privacy filter effect": it had very poor view angle and a ****ty brightness. To be clear, the FHD screen on a Latitude 5570 was far better than the one in my P7530. A totally shame for a very high-end computer and a screen supposed to be of a higher quality!

    When I phoned Dell, The support offered me to change the screen. The new one is better than the older one, but it still not worth the extra cost of this screen in my very own opinion. As you described in your previous post, there is also light stain in the lower left side and the brightness is still not totally homogeneous depending on the viewing angle.

    Hopefully, I mostly work with external monitors and I'm not a graphist so these defects won't impact the quality of my work. This computer is really good, but the screen is a real disappointment and I would not recommend the 4K screen. Many things are said about Apple, but I must admit that the quality of the screens of their MacBook Pro is just exceptional. I may have set the bar too high, expecting such quality on my P7530 screen...
     
  9. Aaron44126

    Aaron44126 Notebook Prophet

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    Messing with a custom fan profile on the 7530.

    [​IMG]

    In SpeedFan, "Fan1" is the right fan which is closer to the CPU, and "Fan2" is the left fan which is closer to the GPU.

    I put the system under load with Prime95. With the fans running at "100%", the temperature stabilizes a bit above 80. The CPU goes up above 3.2 GHz but ends up drops to 2.9 GHz under a sustained load. The clock behavior is the same as I get with the EC running the fans. (Undervolting could possibly allow it to run above 3.2 GHz for longer.)

    I tried shutting off "Fan2" (the fan closer to the GPU), wondering if it was really helping at all. It made no difference in temperature or clock speed cap. So, it seems that running that fan while the system is under CPU load but not GPU load is pointless.

    I let the system return to idle with both fans running at "50%" (around 2000 RPM). The CPU idles with temperatures around 40. Fully shutting off "Fan2" didn't change this temperature either. So yes, even though there is a heat pipe there, it seems like a pointless fan (when it comes to CPU cooling). Not that it matters that much. At 2000 RPM the fan is barely audible.

    On the GPU side, I had to run Furmark for over a minute before it hit 85C with "Fan2" running at 50%. I have it kick the fan to 100% at that point which kept the temperature stable at around 82/83. The GPU never dropped below the maximum clock speed, a bit over 1.5 GHz. The left fan alone seems to be enough to keep the GPU temperature under control. This is with the Quadro P1000, I imagine the better cards would get hotter faster. I have the GPU fan set to run at 0% when the GPU temperature is below 70C. It stays in 50's for general desktop use (powering three 4K displays with Optimus disabled).


    The Precision 7730:

    [​IMG]

    This system is more symmetrical and there doesn't seem to be a single fan specifically suited for either the CPU or GPU. Probably best to run both fans for both components? I'd be interested to see any test results.
     
    Last edited: Jan 22, 2019
  10. Ionising_Radiation

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

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    @Aaron44126, great job on getting the EC controller to play nice with the custom driver. I might try it soon, but before that I have several other projects w.r.t the P7530: a better display, repasting the laptop (but first preparing a benchmark suite), and installing 32 GB of RAM.

    At some point I'd also like to try out the Pascal TDP Tweaker, given that nvflash can actually access and dump the VBIOS from the chip onto disk. I'd like to see if I can adjust the voltage curve, too, given that we've got some decent thermal headroom.
     
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