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9 Posts

05-24-2019

GB

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W541 4910MQ New thermal paste.

2019-05-24, 16:03 PM

I purchased a W541 4910MQ a while ago but graduly over time and use the CPU temps became an issue reaching 99c and above, which of course caused slower performance.

 

After finding this guide https://www.youtube.com/watch?v=GtJnBYRX2Zc

 

I decided to re apply new thermal paste and selected thermal grizzly Krionaut, following the above video was easy, even though not in english. after cleaning the fan and heatsink of any debris and fluff i cleaned the heatsinks with alcohol and removed all traces of the old thermal paste which compared to thermal grizzly was much thicker and looked poor.

 

After cleaning the CPU and K2100 GPU i applied the new thermal paste and re asembled the W541.

 

What a fantastic diffrence thermal grizzly made to temps, before it could reach 99c under full load and now absolute peak is 79c under

full load, it sits at idle now at 32c. it fully boosts and i have to say better than it was new temp wise.

 

When i first got this W541 i always thought it run hot compared to my W530 and was sort of regreting the upgrade. but now i wish i had done this from new.

 

I am not sure what thermal paste lenovo use but what ever it is they should strike a deal with thermal grizzly as i was amazed at the diffrence.

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2 Posts

11-26-2019

US

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Re: W541 4910MQ New thermal paste.

2019-11-26, 18:28 PM

Sorry for reviving an old post. I recently upgraded my w541 from an 4810mq to a 4940mx. Temps were "okay" with the 4810mq, but I wanted better performance. After upgrading, the 4940mx would heat up to 100c @ 100% load using Gelid Extreme after just a few minutes @ normal ambient room temps. Fan diagnostics are good to go.

 

So I repadded and repasted with CLU Liquid Metal. It still manages to heat soak to 100c under 100% load, but now it takes about 10 minutes. So I modded the bottom lid, venting it like an Alienware. That brought temps down about another 2c, but still bouncing off 100c after about 10 or 15 minutes. So I added an active cooling pad, that brought temps down another 2c or so. Then I undervolted with Intel XTU to -110 offset and 40 across all cores. Doesn't really help much that I can tell. Looked for a beefier heatsink unit that might be compatible with the w541 platform. Nadda. I'm totally open to modding, and pretty good at it, but can't find anything close.

 

Was currious if there is anything else I can try? I might need to step back down to my 4810mq or a 4910mq, this 4940mx is an inferno. Prolly better off in a watercooled desktop rig. lol.

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2 Posts

11-26-2019

US

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Re: W541 4910MQ New thermal paste.

2019-12-03, 15:32 PM

Update:

 

So apparently Liquid Metal might have some "cure time"? My temps seem to be stabilizing, meaninging it's taking longer and longer to heat soak to 100c under 100% load. Maybe just wishful thinking.

 

I added (2) "vacuum coolers" to the exhaust vents and reapplied the undervolt + overclock. Temps are stabilizing around 92c - 95c under 100% load now. Normal ambients.

 

To get the thermals of this i7-4940mx beast under control, I had to:

 

1) repadded MOSFETS, memory, etc with 1mm thermal pads.

2) repasted the CPU & GPU with CLU Liquid Metal.

3) modded the bottom lid with screened "alienware" vents.

       plus, I modded the bottom lid to separate cleanly so I can quickly & easily access the w541 internals without having to tear it down to the chassis each time.

4) undervolted + overclocked the CPU with XTU.

5) added (2) external vacuum coolers to the exhaust vents.

 

What a pain. If I had to do it again, I would slap in an i7-4910mq with a Liquid Metal repaste & repad, and call it good. The venting in the bottom lid is still a nice touch tho. lol.

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5 Posts

11-10-2019

BG

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Re: W541 4910MQ New thermal paste.

2019-12-06, 6:15 AM
Hello, Vapormatt,
Will you share what is your OS, Bios and VGA driver versions?
I am having some thermal problems on my W541 and yesterday cleaned the heatsink, reapplied the thermal paste with Arctic MX4 which is closer to the Kryonaut you have used. But get around 45-50C on the CPU while idle. I am running a clean W10 1909 (18363.476) with current updates, latest bios (2.40), nvidia is 24.21.13.9836 and my CPU is 4900MQ. Just wandering if this is caused by the new microcode.
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