LENOVO LEGION 5 15ACH6H Thermal Paste Change Complete Guide | Honeywell PTM7950

[@PulsarTECH]

Thanks for watching! 😊 If you enjoyed the video, please Like, Comment, and Subscribe for more content! Your support means a lot. If you'd like to support the channel further, consider using Super Thanks! 🚀

[@alexiejmediator2963]

Why does Honeywell 7950 SP paste seem to perform worse than Honeywell PTM7950 immediately after being applied to the CPU or GPU. This is because the 7950 SP paste requires drying for 24 hours at room temperature to obtain the same parameters as PTM 7950. The paste uses a certain solvent to make it easier to spread...

[@engineeringcanada]

Wow, this is the most detailed guide for changing thermal paste on Lenovo on YT. Keep it up!

[@PulsarTECH]

You're welcome, I try to make this video so that anybody can do it on their own, even without much experience. But of course, you need to be very careful.

[@VanDannyCyrus]

You've mentioned the trick with the power button, that's great. Thank you!

[@PulsarTECH]

You bet! Glad it was helpful.

[@armedguy]

Ur the only one who told how to open the back panel properly thanks man👍

[@PulsarTECH]

Awesome, hope this video helped you with your repair.

[@rhen4short]

Hey man, Lenovo Legion 5 user here. It's been 3 years and I haven't opened up my laptop since purchasing it and your tutorial helped me a lot with cleaning my own Legion 5. Before opening it, my CPU temps were reaching a maximum of 100 degrees celsius while playing games and an average of 60 degrees celsius with non gaming activities such as browsing, watching movies, talking to friends, etc. And right now it's on an average of 45-50 degrees on idle. I found out that there's a lot of dust on the fans that were definitely clogging the airflow. I'd like to say thank you for uploading this tutorial video of yours. Now I can buy games on the upcoming steam sale. Thanks again!

[@PulsarTECH]

Awesome! That's a huge improvement. Glad it helped with your gaming.

[@ARTHURresul]

Could you tell me what thermal pads have you used ? Thinking about Honeywell ptm 7950.

[@PulsarTECH]

@@ARTHURresul I recommend using liquid thermal pads for memory chips, MOSFETs etc:, here is a complete video here kzbin.info/www/bejne/d37Xf62Xd9t6aqc where show how to use them.

[@manuelrusso7384]

Hi man, did you replace the CPU and GPU thermal pads or just clean the coolers? Because I'm in the same situation and I don't know what to do.

[@joakozeta]

Thank you for guiding me throught the process, great video!

[@PulsarTECH]

You're very welcome! I appreciate your feedback.

[@HyperSpeed249]

Thanks, this will be a perfect guide for me when I need to disassemble the laptop.

[@PulsarTECH]

Great to hear!

[@ahmadkhanniazi]

This was an amazing video. I was re-pasting for the first time and it helped me through and through. Thank you so much! Subcribed.

[@PulsarTECH]

Glad to hear it helped you out! I appreciate the support!

[@PulsarTECH]

BTW, I've got a second video after that where I have achieved even better thermal results using a bit different thermal interface, check it out if you haven't seen it: kzbin.info/www/bejne/d37Xf62Xd9t6aqc

[@tahmidrahman1034]

Very helpful appreciate it

[@PulsarTECH]

Glad to hear it!

[@samylight6637]

Best video helped me a lot

[@PulsarTECH]

Glad to hear that

[@NavedKhan-n1m]

Just replaced the thermal paste on my Legion 5 2020 (AMD version) today. Kept the original thermal pads and used Arctic MX-6 for the CPU and GPU dies (applied using the pea method). Now seeing temps around 60°C instead of 93°C during Cinebench benchmark tests! Tips: 1. Don’t overapply the paste. I tried and didn’t get good results, so I had to redo it. 2. The thermal pad thickness I used was 1.5mm. Hope this helps anyone planning to repaste their laptop!

[@PulsarTECH]

Thanks for sharing your experience and tips, that's really helpful for others!

[@Humanity-Striving]

Check in a year what will be the temps.

[@TuanTran-qk9my]

You are using that thermal paste not correctly, the 7950sp paste need around 24 hours for drying the solvent of this paste to change into the final form not the same as the PTM7950 Pad which had been dried normally before shipping. You also used too much paste, it will cause the longer time to heat treat the paste and more difficult during the next time you clean the dry paste.

[@PulsarTECH]

Hi, thanks for your valuable observations. Indeed, I have had to take a different approach to fix this issue. Luckily, everything worked out great. More on that in my next video, but it has increased the results in Cinebench R23 and reduced rendering time on that same video by 2 minutes!

[@PashuLLer_2OO7]

Thank you for this video!

[@PulsarTECH]

You're very welcome! Thanks for your feedback.

[@harrydijkstra9936]

Downside of many laptops are the fans integrated under the heatsink which doesn't allow cleaning the cooling stack without removing it from the board. Genuine PTM is basically a forever good material and only cleaning the fans and stack brings the original performance back. There are alot of counterfeits like relabeled PTM3180 and PCM8500 or even worse, regular paste rolled between plastic sheets.

[@PulsarTECH]

I 100% agree, can't think of a worse design for the fans. Why can't they be accessing from the top so that you don't have to change thermal interface every time you want to clean the fans. That's one of the reason why I didn't want to do earlier but seeing the temps climbing so high I had to do it no matter what. By the way, I've got another video after this where I have achieved much better cooling results, check it out if you're interested: kzbin.info/www/bejne/d37Xf62Xd9t6aqc

[@premabhakti4034]

Yeah, that's way too much dust. But the problem is you that you can't get there without removing the whole thermal interface and consequently changing the thermal paste each time.

[@PulsarTECH]

Absolutely, that's a major downside of this laptop's cooling design. Easy access to clean the fans is crucial to maintain good air flow.

[@UltimatumDemon]

21:06 Don’t use Ethyl, these aren’t made for chips. Those things have water and chemicals that’s not good for the pc. You need Isopropyl alcohol

[@hapham6055]

What is the oil on the thernal? You have not explain it, was it serious? I going to buy a old legion, it have many oil on the thernal too

[@PulsarTECH]

Hi, good question! The oil you saw is probably silicone that leaked out from the old thermal pads. These pads contain silicone, and when they age and are exposed to extreme temperatures, like 100°C, the silicone can seep out. This could be a sign that the laptop has been running hot and hasn’t been serviced regularly. On the other hand, it doesn’t necessarily mean something is wrong.

[@RedCroc-sr6cc]

Wonder if it's normal for the laptop CPU temperature to reach over 100C when both CPU and GPU are loaded 100%? Thanks for this guide.

[@PulsarTECH]

Could be, but I think it should stay below 100C. My next step would be to change thermal pads for the liquid ones and use the same Phase-change thermal paste to see if it will make a difference.

[@chongys9901]

Ur cpu temp constantly running 100 degrees or just few of the core running to 100degree sometime ? It thermal throttling, I have same issue as well , I think the best suit thermal paste for legion is ptm 7950 , because before I apply new thermal paste , it won't have this happen , this only happen after I'm apply new thermal paste , I have to order one and reapply again 😂 but gpu is okay to use thermal paste

[@PulsarTECH]

​@@chongys9901 I have just posted a new video on my channel where I have fixed this overheating issue completely, check it out. kzbin.info/www/bejne/d37Xf62Xd9t6aqc

[@ontheroad1930]

Well done 👍 Everything in details. How often do you recommend changing thermo paste?

[@PulsarTECH]

Usually once a year would be good when cleaning the fans.

[@TheGenesario]

That's not old dry thermopaste. It's phase shift thermal interface, it becomes liquid when chip is hot. So no need there to replace it, I believe removing that excessive dust helped to reduce temperature

[@PulsarTECH]

Yeah, unfortunately to clean the fans on this laptop, you need to take the whole thermal interface off thus need to replace the thermal paste. I have done another thermal interface change later and have finally achieved brilliant results, here is a second part: kzbin.info/www/bejne/d37Xf62Xd9t6aqc

[@furkankose4773]

Its funny enough without knowing about the mounting i bought arctic mx-4 and know my CPU is overheating :D I guess I found the problem finally thanks a lot

[@PulsarTECH]

Glad it was helpful. You can check out the following thermal interface change I've done later, and it has showed even better results. Here it is: kzbin.info/www/bejne/d37Xf62Xd9t6aqc

[@speechless-streamer]

what app u use to see the temps and watts

[@PulsarTECH]

It is Aida64.

[@Heet10]

My screw near heat sink are being stripped what should i do to remove it?

[@PulsarTECH]

Hi! A stripped screw can be frustrating, but there are a few methods you can try to remove it: Place a wide rubber band over the screw head, then firmly press your screwdriver into the rubber band for extra grip as you twist. If you have access to a screw extractor kit, these tools are specifically designed to remove stripped screws. Be very careful not to damage any other components on the motherboard and always disconnect the battery first!

[@tinosqindis1184]

Well detailed disassembly.When running r23 benchmark which performance mode where you using?

[@tinosqindis1184]

Is it quite mode ,or normal mode or performance mode

[@PulsarTECH]

It was in the balanced mode. Actually, today, I've upgraded my thermal interface again and achieved much greater results than before. I will be working on a new video, hopefully it will be out soon, the results are so satisfying. Stay tuned!

[@EugeneGladkykh]

Thanks for sharing thermal pads thickness, are grey ones are same 1mm? Looks like you had CPU turboboost off during cinebench test. Frequency and power are too low for r7 5800h. I just tested my 2yo 15ach6h and get 12582/1397 score and temperature hits 100C but R7 still keeps 4Ghz and around 78W power in red mode.

[@PulsarTECH]

Hi, yes the turbo boost was off and laptop was in a balanced mode during the test. Later I have redone the thermal interface again with a solidified phase-change thermal pad instead of liquid and have achieved much better results : 11116/1356 without turbo boost but with temperatures not exceeding 95C. Here is it if you want to check it out kzbin.info/www/bejne/d37Xf62Xd9t6aqc

[@uchihasasuke-xs5bp]

thanks for the video, can i do this guide with legion 5 pro? or are there something different that must to be done?

[@PulsarTECH]

Hi, the basic steps and precautions like disabling and disconnecting the battery are going to similar, though the disassembly might vary slightly.

[@sleet9289]

Why remove the ssd cards? is that necessary to change the thermal paste?

[@adityach454]

No

[@jayanthbm4100]

Can you share the link to buy thermal paste and other items..

[@PulsarTECH]

Hi, you can purchase phase change thermal paste from your local market places or global ones like AliEpress. I've got mine from a local market place. Also make sure to check out my second video, I have redone thermal interface once more and achieved even better results, here it is: kzbin.info/www/bejne/d37Xf62Xd9t6aqc

[@ragerr6060]

Can you give me the link to buy honeywell ptm for other countries or the link you bought from, and how much amount of thermal paste you bought (thickness)

[@brandonl4511]

My temps run around 90c... I'm scared for the amount of dust I'm about to find in there lol

[@PulsarTECH]

Hi, if the laptop was like mine with no cleaning for about 3 years, it will be dusty there no doubt about it. But it your thermals never get above 90C, that means the cooling system can handle it pretty well. Either your CPU power doesn't get to 60W or your cooling system is in a superb condition. In my opinion, I would keep an eye on the temperatures and if it stays below 90-95C during intensive use, I wouldn't even bother with thermal interface change. I have got another video where I have achieved much better results. Check it out if you like: kzbin.info/www/bejne/d37Xf62Xd9t6aqc

[@JohnnieTheRabbit-ro1jh]

Hey my ryzen 9 7945HX can go op to 100c and 105 watts in crossload. Thats what too much while gaming. Limit to 60 watt and reapply thermal paste can help.

[@bunnybag]

I've the same laptop, and my 5800H produces Cinebench score of around 14K, but at temperatures near 95°C I'm sure that you were not using the Performance Mode of the laptop.

[@bunnybag]

If that's not the case then maybe you didn't wait for the curing time of this paste. You'll have better results once the paste actually takes it time to settle in Which is around 15-20 hours at room temperature. What I also like to do is stress test for a minute or two, then stop it for a while, and then repeat. Basically I try to switch from very high to ambient and back to very high so that the Phase Change can occur multiple times, and all the gaps get filled.

[@PulsarTECH]

You are correct; I was not using Performance mode. 95°C isn't bad for Performance mode; I think it’s the upper limit for how hot you want your CPU to get. Anything higher needs to be addressed. By the way, in my next video, I achieved much better results-check it out if you haven't yet! kzbin.info/www/bejne/d37Xf62Xd9t6aqc

[@PulsarTECH]

Thanks for the advice. I have tried to run some stress tests for a bit, maybe not enough though, but after 2 weeks or so, I don't think there was much difference, so I have decided to undergo another thermal interface upgrade.

[@swixxVaL]

Does it matter if the thermal paste gets onto the the small things around your gpu and cpu when you squash back the cover?

[@PulsarTECH]

Hi, good question! No, it doesn't matter because thermal paste is not electrically conductive, so it is safe if it spills over those ceramic capacitors.

[@JohnnieTheRabbit-ro1jh]

It is also possible to undervolt the Ryzen 7 5800H with AMD APU TUNING UTILITY to get better performance and lower voltages and same wattage.

[@PulsarTECH]

I haven't done it myself but yes, undervolting the Ryzen 7 5800H using the AMD APU Tuning Utility (or other tools like Ryzen Controller) can help you achieve better performance by improving power efficiency while maintaining the same wattage. Undervolting reduces the voltage supplied to the CPU, which can lower power consumption and reduce heat output. This might help you maintain higher sustained performance, particularly during long tasks or heavy loads, as the CPU may not throttle as quickly due to heat. While undervolting is generally safe, it's essential to test the stability after adjustments, as too low a voltage could cause system instability. Start with small increments and stress-test the system to ensure stability before proceeding further. By the way, in my next video, I achieved much better results-check it out if you haven't yet! kzbin.info/www/bejne/d37Xf62Xd9t6aqc

[@JohnnieTheRabbit-ro1jh]

@PulsarTECH yeah I undervolted my ryzen 9 7945hx. It works.

[@PulsarTECH]

@@JohnnieTheRabbit-ro1jh great!

[@ionutdiscultu809]

Hi, does anyone know what the actual size of GPU and CPU are? I needed in mm to eventually buy a thermal pad Honeywell. Ty

[@PulsarTECH]

Hi, Ryzen 7 5800H is 14x13mm and Nvidia RTX 3060 is 19x14mm. By the way, I've got another video where I've used solidified phase-change thermal pad, check it out: kzbin.info/www/bejne/d37Xf62Xd9t6aqc

[@JohnnieTheRabbit-ro1jh]

I repasted my Lenovo Pro 5 With 4070 mobile and Ryzen 9 7945HX with Thermal Grizzly Kryonaut Extreme with a Thermal Conductivity of 14,2 W/mk. And reapplied the thermal pads, a little bit of the thermal pad on VRM's was not applied that good. Temps on crossload are a bit lower now. Maybe I will use Gelid Extrema pads with 15 W/mk pads on VRM's. Max 65 on GPU and max 80 on CPU. GPU can go op to 120 watts and CPU 60 watts (undervolt -25 Curve optimizer and lenovo vantage max 60 watts. It can boost to 105 watts in crossloads, well that's way too much wattage for Ryzen 9 7945HX. Thermal design is rated for 200 watts crossload. I followed your steps!

[@PulsarTECH]

Great, thanks for sharing your experience and feedback!

[@ashmaterial]

thats not how you apply paste mate. it should be small amount

[@AjayJadhav09]

Bro my right fan makin noise what to do

[@PulsarTECH]

Hi, it may be due to dust buildup, a misaligned fan, or wear and tear. Determine if it's a rattling, grinding, or whirring sound. Each noise indicates a different issue (e.g., dust, misalignment, or bearing damage). Does the noise happen under load (e.g., gaming) or when idle? Dust is a common cause of noisy fans. Over time, it accumulates and can obstruct the fan blades. If cleaning and adjustments don't help, the fan might be damaged. Purchase a compatible replacement fan (check the Lenovo model specifications). Replace the fan yourself if comfortable or seek professional help. Hope this helps!

[@AjayJadhav09]

@PulsarTECH it makes rattling noise sometimes. It is not consistent with noise. I guess fan bearing needs oiling. I have read on reddit same happening with other people's.

[@ragerr6060]

how to identify if the Honeywell is original or from verified seller

[@PulsarTECH]

Well, there ain't any scratch code like on a Gelid or Thermalright products where you can verify its authenticity. My suggestion would be to buy it from a trusted local market place or shop.