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

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.

 

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

 

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:



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.

 

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.

 

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.

 

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.

 

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

 

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.

 

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.

 

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).

 

Yes, non AVX tests require much less voltage and produce much less heat.
However many (and myself) consider the CPU to be 100% stable only when it also passes AVX test. Even with AVX test the testing might pass in 1 software, but fail in another, so several AVX software (like Linx and Aida64 FPU test) are needed to truly test stability.
Just testing with software which give light load (like Cinebench) will not completely test stability.
Not many games use AVX, but those who do might crash with those settings.
True VCORE drops for me too to 1.210-1.225V during AVX test however mine does not fail because it stay at only 90C, yours probably fail because it reaches 100C+.

But this above linked video is a perfect example that this CPU is NOT suited to be used in a laptop because even at stock clocks, it will reach 95C in games like Far Cry 5.

Yes, it gives good temps at 4.2 Ghz even in a laptop, but why on Earth would you pay extra just to downlock the CPU by 500 Mhz ?!

 

Whats the difference? You say/mean 9700K don't use sTIM?

Have you ever heard about the feature AVX offset?

From CaseKing/der8auer sales site (binned cpu's)

 

Less heat due to lacking Hyper-Threading.

 

I know that. Re-read my post his statement. "He said in short 9700K is easier to delidde". Hence my Q

For the records... Coffee-Refresh K models use sTIM

 

The 8086/8700 would be the far easier ones to do and will still perform very well in games.

 

I haTE a shared heatsink.

 

It's a better performing one at idle and load so why?

 

My problem with your thinking is that you think the 9900k needs to be at stock clocks to be dramatically faster than anything else. Even at 4.3 ghz that I found stable at AvX workloads, the 8 core/ 16 threads should still render faster than a 8700k, thus being a large upgrade and totally worth it from my perspective.

 

The stock all core turbo is 4.3Ghz, treating it like the single core turbo is the "stock clock" is the wrong way to think of it.

 

The stock all-core Turbo on the 9900K is 4.7GHZ though.

 

Ooops I'm thinking of the 8700k there. Though AVX will of course be lower than max all core turbo.

 

...oooor enthusiasts like me who travel and move a lot, thus depending on laptops and using all the CPU & RAM performance they can get their hands on for their work ill try not to take that too personal haha ill report back once i know what kinda clocks i can reach with the 9900K in my machine

 

Anyone that needs to do video editing while travelling will be great friends with the 9900k for instance.

 

Are you refering the shared heatsink ?
I get that it provides better performance, but it reminds me of the warped heatsink I had on the first batman. >-<
Is that still an issue nowadays ?

 

Not so much.

 

Argh its out on https://clevo-computer.com/e-sport-...g-desktop-laptop-nvidia-rtx-2080-vr-mxm?c=397
Really wish I had 3k ready to blow already ><

 

everything is almoust ready.. we share soon screenshots from Benchmarks.. Cooling Systems and GPU.

 

Im corious about the cooling system..

 

We have photos into p775 topic.

Fastest Customizable Gaming Notebooks & Mobile Workstations | CLEVO System Integrator

 

One more time...

Fastest Customizable Gaming Notebooks & Mobile Workstations | CLEVO System Integrator

 

Hi everyone. I'm new here.
I've been googling about Clevo with 9700K/9900K for quite a long time, since I'm thinking to buy a similar laptop:
Clevo P750TM1-G: 9700K or 9900K, RTX 2080 (for the easiness of the usecase let's assume I'm not planning to do overclocking and want to just use everything with stock values).
On many pages I've read that 9900K is noticeably hotter than 9700K/8700K and the latter 2 are highly recommended to be chosen instead, unless I want to turn my laptop into a hadron collider.
However, on a couple of pages I've read one interesting idea: turning off HyperThreading for 9900k.
Which will turn it into a 9700K, but with a higher frequency and noticeably more cache, and might reduce 9900k temps by 7-15° in comparison to 9900k with HT.
Wondering, has anyone tried this already? (If yes, does it actually work? and how are the temps in comparison to a P750TM1 with 9700K?)

 

it does definitely work to turn off HT, no problem.

but i got a better solution for you: undervolting! set a value of -50 to -100 mV, thus lowering temps by 15-20C and be happy at running a cooler system without losing any performance repasting and repadding your system is another option to further reduce temps from stock u can do the same with the GPU, as well...

 

Thanks, will try that once I get the laptop.

 

For gaming stick with the 9700k, you can just adjust the clock if you want.

 

With i9 9900k would I be able to underclock it under its base clock to say 2.8ghz in order to get good thermals if I wanted to game with quiet fan noise for example

 

You can undervolt it a fair bit but if that's what you want the mobile series may be better.

 

Can I underclock tho Without problems and to what ghz

On a side note would the i7 9700k be significantly cooler than 9900k

 

Underclocking and undervolting will keep your I9-9900k very cool.
@2.8 for sure

 

Depends if you are using hyper threading and the extra performance it gives.

 

no need for below base clock. at 4.0-4.1 ghz stock voltage ure already at 95W "official" TDP under heavy loads, so im guessing with proper tuning/undervolting/testing you should be able to let the 9900k run even slightly above that, say 4.3-4.4 ghz.

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

 

The fans are optimised for the normal load, not half load is the issue.