[Review] Should You Buy the World's Fastest 15" Laptop w/ i9-9900K? Eurocom Sky X4C (Clevo P750TM1)

Discussion in 'Sager/Clevo Reviews & Owners' Lounges' started by GizmoSlip, Dec 31, 2018.

  1. GizmoSlip

    GizmoSlip Notebook Deity

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    Hello All,

    I wanted to share my latest video review of the Sky X4C with everyone. It's a beast of a laptop, but perhaps has too much chops for its chassis size/fan capabilities. But it surprisingly performed well and stayed cooled when you underclocked and undervolted the i9-9900K. You can see benchmarks at the 6:40 mark. Hope you guys enjoy the video, and please feel free to ask any questions. I still have the laptop currently, though I've swapped in the 9700K currently, so running more tests isn't stable at the moment.



    Video Description: This is the Eurocom Sky X4C, or officially know as the Clevo P750TM1. It's a laptop that features socketable CPU and upgradable GPU. It's the fastest laptop money can buy that's under 8 lbs weight, and that's not all. It's got crazy amount of ports, 4 hard drives slots, and upgradable screen. But is it worth buying? In my review, we do plenty of benchmarks, test out the temperatures, and see how fast it really is. Enjoy!

    There was so much to fit in this laptop review, but I also want to mention something important for advanced users. This laptop comes with an unlocked bios developed by Eurocom. It allows you to overclock/underclock/undervolt the CPU, which is great. But you should be aware that other competitors also offer another bios that is widely regarded as better called Prema bios, which I have used before in previous Clevo laptops. HIDEvolution does ship their laptops with the Prema bios, so there's that bonus for them as well, though Eurocom does charge slightly less overall for the same spec'd laptop hardware.
     
    Last edited: Dec 31, 2018
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  2. jaybee83

    jaybee83 Biotech-Doc

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    nice data, thx for that! :)

    now lets see, so we can say regular paste, non-binned cpu, lidded and only a mild 50mV UV we have 4.4 ghz doable in the 15 incher.

    delid and LM application = 4-8C less = up to 1 Multi
    binned CPU = 1-2 Multis (SL range 4.8 to 5.1 Ghz)
    max. UV and manual finetuning = 1-2 Multis

    so were talking about 3-5 extra multis when properly configured with a highly binned cpu. thats 4.7 to 4.9 Ghz for everyday usage, me likes :D
     
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  3. yrekabakery

    yrekabakery Notebook Virtuoso

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    It looks like Eurocom sent you the wrong version of the heatsink. That version (2 heatpipes over the GPU core) is meant for the GTX 1060/1070, not 1080. This is the 1080 version of the heatsink:

    [​IMG]

    Although with the version you have, you get lower CPU temps in CPU-only loads, at the expense of higher GPU temps and higher CPU temps in combined loads, which actually might be a better idea for the 9900K if you're mainly using the system for CPU-intensive non-gaming workloads.
     
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  4. yrekabakery

    yrekabakery Notebook Virtuoso

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    It doesn't work linearly like that though. The efficacy of the cooling falls off a cliff at a certain point, making it heat soak and reach critical temps very quickly.
     
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  5. GizmoSlip

    GizmoSlip Notebook Deity

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    That is a very interesting find! That would explain why the GPU tended to run warmer than I expected. If anyone is buying the 9900k, they are probably getting it for the multirendering chops it has, otherwise better to go with 8700K and overclock for better overall framerates at a higher clock speed and lower TDP.
     
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  6. GizmoSlip

    GizmoSlip Notebook Deity

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    Eurocom had pasted it with Thermal Grizzallly Kryonaut, so not standard paste. But yes, a lotteried chip would allow for slightly higher clocks at the same temps most likely. Ultimately, the 120W long power limit basically throttles the CPU down to 4.3 ghz approximately after the first 28 seconds 160w short power limit.

    One thing I should have made more clear in the review is that when the laptop is pushing the 160W power limit the temps quickly hit up to 99 degrees and stay hot like 95 degrees, until the 28 seconds is up. That's why I would say it's better to just limit it down to 4.2-4.3 ghz range for both the short and long power limits so you don't push above 90 degrees.

    And now that I'm thinking about it, I also should have put into the review that this thing does get quite loud when running max fans, so don't expect a quiet machine--unless you're okay throttling down to like 3.9 ghz so the TDP of the processor is a lot lower and medium fans alone can cool it.
     
    Last edited: Dec 31, 2018
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  7. jaybee83

    jaybee83 Biotech-Doc

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    haha of course, and it also depends on the kind of workloads we are talking about :)

    Sent from my Xiaomi Mi Max 2 (Oxygen) using Tapatalk
     
  8. DRevan

    DRevan Notebook Virtuoso

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    A laptop with this kind of cooling can not cool the 9900K down. Period. You can not cheat physics.

    I own a 9900K in my desktop PC and I use a rather good quality Kraken X62 AIO water cooling and running the CPU on 4.8 Ghz with the lowest voltage I can set the CPU will reach 210W during FPU test and the temp can go up to 90C.
    During normal workload like Fire Strike physics test and gaming it will stay under 70C, however to perfectly test stability an FPU test is needed.
    Youtube is full of self proclaimed "experts" who set 1.2V for their 9900K and set x50 multiplier for 8 cores to get 5.0 Ghz. This is nice, but they forget to mention that to get 5.0 Ghz stable most chips require at least 1.3V. To top it all off, their "stability test" consists of running 1-2 Cinebench tests and if it does not crash, then they claim that their 9900K is "stable" and they are also very proud that their temp only got up to 80-85C with a cheap AIO cooler or an expensive AIR cooler.

    However this is a lie.

    If these "experts" would load up Prime95 small fft test, Linx cpu test or Aida64 FPU test 9/10 of these "experts" would get BSOD instantly with their settings.
    To get even the slightest chance of running a 9900K without melting the laptop with proper settings and no throttling, you need:
    1) a very expensive cherry picked golden chip (which costs almost double the retail price)
    2) a delidded cpu (delidding is not easy with the 9900K)

    If you really want a 9th gen 8 core chip, go for the 9700K. It is at least 10C cooler than the 9900K and you can easely delid that to gain another -10C. Also in games there is virtually no difference in framerate between the 9700K and 9900K.

    But if you NEED a 8 core+16 thread cpu for work and the VGA is not important, then go for the Helios 500 with Ryzen 7 2700. It runs the CPU much cooler and the fans are also much much more quiet than the fans in these Clevo laptops, it is much more ideal for work.
     
    Last edited by a moderator: Jan 13, 2019
  9. Johnksss

    Johnksss .

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    They have already tried running prime95 and have already failed miserably. Not one of them lasted more than 20 or so seconds before throttling down to to something like 3.6 ghz.
     
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  10. Falkentyne

    Falkentyne Notebook Prophet

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    Sorry but this is a lie.
    My 9900K (yes, i have one) is stable at 1.275v set in BIOS at 5 ghz, in small FFT prime95 (AVX disabled. AVX enabled requires 1.3v and gets to 110C so that's a no thank you). And that's the bios voltage.
    True load vcore is 1.243v. AVX isn't stable at this setting because true vcore drops to 1.225v.
    And no, I don't BSOD. I just get a failed worker. Not even a WHEA error.

    5.1 ghz requires 1.310v bios (LLC= Extreme) or 1.335v (LLC=Turbo) fully stable with small FFT prime95 with AVX disabled (true load vcore from CPU on-die sense is 1.287v).
     
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