Is the P870km1 a significant improvement over the P870dm-g from a cooling perspective?

I know someone with a P870dm-g with dual 980m's who is looking to upgrade to potentially a P870km-1 with dual 1080's.

Their main gripe with the P870dm-g is that from their experience it had horrendous cooling issues that could not be rectified. I can attest that their experience was 100% accurate as I was their go to troubleshooter.

-Heatsinks were warped so replacements were installed.
-Heatsinks were lapped and polished when cooling issues remained.
-External intake and outlet vents were opened to allow for maximal airflow
-Liquid Ultra was correctly applied to both gpu's and cpu
-Replacement GPUs were sourced. All stock voltages/clocks were used.
-Laptop stand with external fans was used.

Nothing fixed the cooling issues. The laptop was essentially unusable for sustained heavy loads from day one. Even after all of the work was done to improve the cooling, the gpu temperatures would never plateau and would eventually result in throttling or hard shut downs after a period of time. Depending on the load, this could happen as quickly as 30 minutes into the load or as late as a little over an hour.

The laptop has never been able to sustain a gaming load (Witcher 3 has been the main use case) for more than 2 hours without hard shutting down or throttling due to heat. I think a big part of it had to do with weak heatsink mounting pressure and fans that could barely move any air.

I'm a big Clevo fan, but honestly this has been an extremely disappointing experience.

I know the P870km-1 with SLI 1080s has the vapor chamber cooler. However the 1080s also consume about 50% more power each when compared to the 980m's. Have the fans in the P870km-1 been upgraded as well? What else has been done to address the atrocious cooling of the P870dm? How are people's experiences with the cooling performance of the P870km (or similar) laptop(s)?

I don't want to see them shell out another large chunk of change for a laptop that is going to have the same fatal design flaws. . .

 

What BIOS you are using? most if heat problems can be fixed with Prema BIOS/vBIOS, with some tuning and undervolting settings.

 

Prema vbios's are being used for the gpus - however the issue persists whether or not his vbios or the stock vbios is flashed. The laptop was bought from RJtech so it did not have the option to have the Prema bios installed on it. The cpu never had cooling problems, but it was also run at stock settings.

I've been out of the loop for a while, but I think for the P870dm, the only way to get the Prema bios would have been to buy the laptop from one of his affiliates and have them flash it at the factory.

If what you're saying is true, and Prema's bios would have fixed these issues (I'm doubtful - how would a system bios mod fix a cooling issue with the gpus) then that's pretty bad on Clevo. The laptop is literally useless, was useless from day 1, and continues to be useless after a ton of time, money, and parts have been poured into it to fix the cooling.

Regardless, even if by some miracle we got our hands on Prema's bios and it did fix the issue, the P870dm can't be upgraded to SLI 1080s. So they're going to be buying a new laptop either way (they want the extra horsepower for 4K and VR) - and would prefer to stick with Clevo due to previous good experiences. Just don't want to run into the same cooling nightmare in what on the surface appears to be an almost identical laptop . . .

 

my p870km1g from eurocom with original thermal had correct temp, i guess it was 72 for gpu gaming and 87 for cpu while gaming too.
Then i repaste with ic7, i delidded cpu and i baught the dual heatsink for 1 gpu. i remove also all plastic from grils to allow morr airflow, i have 7700k and 1070mxm. Cpu reach max 75, idle is 40. Gpu reach max 52 and idle is 37.
Gaming is with max fan speed available from system. idle sometime litle noisy or not.

 

I looked at the motherboard schematics and the P870km seems to use 12v fans while the P870dm seems to use 5v fans. Could anyone confirm this? I'm assuming this means significantly increased CFM ratings?

 

Yes that’s correct

 

12V fans are *significantly* noisier at full bore than the DM's fans.

I haven't touched this DM3's cooling yet apart from the bottom case foil, nor played much in the way of games, the 1080s run hot on 'auto' fans on games that push them (4K) but at least the CPU refuses to go beyond 90C even at 4.7 on what I'm assuming is stock paste (because the heat is shared across the ginormous GPU heatsink).

My 980M SLI P870DM took a lot of trial and error to get the cooling awesome, I had to bend the heatplate and heatpipes for proper alignment, bend the spring arms for more pressure, swap out thermal pads for ones that actually fitted, delidded the CPU, taped the CPU fan gap, liquid metalled it all, and cut the foil off the bottom. End result, temps in the 70s at full load fully overclocked, 4.5-4.6 CPU, 1375mhz GPUs. There is enough in all the heatpipes, copper, airflow and rads in its design to cool the hardware extremely well even though it was (and its P870 continue to be) the most powerful laptop on the planet, it just needs to be tinkered with extensively to remove stupid inaccuracies from poor factory and/or reseller QC and too thick thermal pads. It may be a high end expensive laptop but it's still Made in China......

 

In terms of raw cooling the vapor chamber heatsink is king.

 

So what gives?

We just bought a P870km1-g with dual 1080's and a 7700k.

We're having nearly the exact same cooling issues. We've applied Liquid Ultra to the gpu's. We're running the computer with the bottom cover removed and propped up so there is at least 3 inches of open space below the fans. Fans are set to 100%. Everything is at stock settings in terms of clocks and voltages. Ambient temperature is 24C.

After about 30 minutes playing the Witcher 3 at 4k with everything maxed, the Master is pegged at 90-91C and the Slave isn't far behind. No throttling issues yet however, which is weird.

What is going on?! How is it that elsewhere on the forums people are claiming to be sitting in the mid 70C under similar loads? This is getting stupid.

 

Maybe the gpu is not having a proper contact with the heat-sink. Main culprit is thermal pad thickness. Check this one http://forum.notebookreview.com/thr...876-owners-lounge-phoenix-3-0.800081/page-182

And no need to remove the bottom cover, just do this mod:



and if you want to control the fan via software use nzxt grid v3 fan controller as a replacement for the kingwin brand.

 

I would say your LM application is not sitting right.

A normal setup will hover around 85C if there is a slight issue with cooling due to aggressive throttling starting to kick in then. 90-91C suggests a big cooling issue.

Liquid metal does not forgive even a slight mismatch in fit.

Try it with a decent normal paste and check if the heatsink is ok first.

 

Do the test with ic7 but dissipate yourself to the whole core with a credit card or anything like that. ( to dissipate easely, warm the tube of ic7 in hot water, the application will be easier )
If the results are better, you got it. I'm sure it will be because i notice metal liquid is very tinny, and when we have near the core some thermal pads for the vram who are making less pressure for the core due of their size, here the result. You can do like tanzmeister, instead of using thermal pads, you can use thermal paste to let free all the pressure only to the core. or simply using more little pads for the vram.
Also, it might depends what is your heatsink. i have a gtx1070, the single heatsink was giving temp near 70 if im not wrong. The heatsink who use 2 fans is giving me temp near 50-53. i guess the vapor chamber will give me better results.

 

I did the mod above (didnt cut the base for the air to go through tho) and it works like i would expect! Fresh laptop and a cool base

 

Whats your config @W00d_m3 ?

 

My Clevo? A P775DM3-G with a 6700k with a 1080 with 32gb of ram, 3 SSD's (1x256, 1x500 and a M.2 of 1TB)
Runs fresh as expected

Enviado do meu SM-N950F através do Tapatalk

 

Have you tried thermal paste instead? LM imo is antiquated considering thermal grizzlys cools better and applies a lot easier. Another thing can be static pressure loss through the gap between fan and heatsink. I usually put a peice of electrical tape over the gap to force that air through the heatsink. The last thing I can really think of is thermal saturation. If I were to play witcher at 1080p I'd probably be in the high 80s as well. It can happen that the fans are not powerful enough, or the heatsink is too small for the load it bears.

 

Liquid metal is still better, it is just fussier about contact.