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Precision 7550 & 7750 Owners' Thread

Discussion in 'Dell Latitude, Vostro, and Precision' started by SlurpJug, May 30, 2020.

  1. NelBro78

    NelBro78 Notebook Enthusiast

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  2. SlurpJug

    SlurpJug Notebook Consultant

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    Tough to say. These two processors are basically identical save for binning, ECC support, and some other features like vPro. The performance will depend completely up to implementation of cooling + power limits.

    There's a Clevo / Kunshan chassis out there (Eluktronics MAX-15 and MAX-17 that allows its i7-10875H to run at 120W continuously, provided that the cooling solution can keep up with it. That squeezes out 4200-4300 points in CB20, something this machine can't even do. Highest I've gotten was 4080.
     
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  3. SlurpJug

    SlurpJug Notebook Consultant

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    UPDATE: Kingpin KPx has become senile after 24h. Peak power draw in CB20 never exceeded 105W, wheras it handled 125W for up to 10 seconds, and above 115W for the duration of PL2 when the paste was freshly applied. I've tested twice, using line / x method and spread method. Losing 20W of thermal capacity in a day is disappointing in terms of the trajectory this paste will take. Who knows, maybe it won't be able to support 60W in a month.

    A new tube of Gelid GC-Extreme just came in the mail. I will be testing this now.

    UPDATE: The Gelid can't even maintain 75W fresh out of the tube... hahahaha

    At this point I guess I will just live with 100C :p
     
    Last edited: Jun 22, 2020
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  4. Evahum

    Evahum Notebook Enthusiast

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    "Eluktronics MAX-15 and MAX-17" use chassis from Tongfang, another ODM different from Clevo. Kunshan is actually a location name "famous" for making knockoff laptops like "Dell precision 5510".

    I am also very impressed by the performance of i7-10875 in Eluktronics MAX-17 (17') and mech G3 (15') which can run at 120W continuously with only 2.1 Kg. I just don't understand why Dell only allow 75W for long term running.

     
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  5. SlurpJug

    SlurpJug Notebook Consultant

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    You are right, I meant Tongfang. My bad.

    I don't think the thermal solution is appropriate for handling 120W on the CPU alone. There just isn't enough heatsink to dissipate the heat coming from such a small die surface area. The much larger GPU has no problem staying relatively cool.

    I've already exhausted the best of the best in terms of thermal compound. I've also tested Kryonaut and it's absolutely not for laptops, like many here at NotebookReview have said. The only one I haven't tried is Phobya Nanogrease but at this point, they're all more or was susceptible to the same issues.

    I had Conductonaut on my 7540 for a month and while temps were excellent, the compound alloyed with the copper and it also scoured the surface of the CPU and GPU, leaving rough pitting behind. Wasn't worth it to me, even with a 15c temp drop. I don't want a damaged CPU and GPU surface.


    Sent from my iPhone using Tapatalk
     
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  6. SlurpJug

    SlurpJug Notebook Consultant

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    I hooked up my machine to an external monitor with mouse and keyboard.

    The fans are running on full blast nonstop and the air coming out is cold. In HWiNFO, all temps are very low except for Dell EC: Temp2. Anyone knows what this might correspond to?

    [​IMG]

    EDIT: Found the culprit. Somehow the hidden High Performance Mode (CsEnabled is set to true on this) got activated when I connected the monitor. The high performance mode must have disabled Link State Power Management which will cause the PCH to run very hot. This might have been at the root cause of my issues.

    Though I never ran into this issue on my 7540 because it had a little cube shaped thermal pad connecting the PCH to the lower side of the palmrest assembly.

    EDIT: It appears that Dell Optimizer (the new AI Machine Learning Optimizer Hoo-Hah app) is responsible for messing with my power profiles. Begone!
     
    Last edited: Jun 23, 2020
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  7. SlurpJug

    SlurpJug Notebook Consultant

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  8. Ionising_Radiation

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

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    Ooh, Witcher 3. How does it run at 4K resolution?
     
  9. SlurpJug

    SlurpJug Notebook Consultant

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    Hahahahaha

    24fps :p

    I really want an eGPU now... GeForce RTX 3000 is just around the corner! I've been eyeing the AKiTiO Node Titan..
     
  10. Ionising_Radiation

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

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    That's actually not half bad! Turn down some graphics settings and I think that could go to 40+ FPS. Still decent for 4K, I feel.

    I wish some older games—AC Origins/Odyssey, Witcher 3, etc. could have DLSS 2.0 and RTX retroactively implemented.

    I've tried Control + DLSS + RTX, and my god does it look good, and runs fast.
     
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