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jasoni26
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Registered: ‎09-13-2017
Location: CA
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Message 1 of 15

T470 - Crucial DDR4 memory stick gets hot while suspended.

After receiving my T470 I added a 16GB stick of Crucial DDR4 memory and noticed it gets hot while the laptop is suspended; battery usage while suspended is also quite high.

 

I tried this stick alone in both slots and the same thing happens. Of course, with the stock Samsung RAM alone, this does not happen. It stays nice and cool when suspended.

 

This happens with Windows and Linux, so I don't think its an OS issue.

 

Any ideas?

Thanks.

 

Community SeniorMod
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Message 2 of 15

Re: T470 - Crucial DDR4 memory stick gets hot while suspended.

I am not an electrical engineer, but DDR4 memory is supposed to go into a low power sleep state.  Something isn't working the way  I think it should, and if the original memory doesn't get hot, my guess is that your 16gb stick is the problem.  I don't know if it is a defective stick or the entire model.


Rich


I do not respond to requests for private, one-on-one help. Your questions should be posted in the appropriate forum where they may help others as well.

If a response answers your question, please mark it as the accepted solution.

I am not an employee or agent of Lenovo.
pjc123
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Message 3 of 15

Re: T470 - Crucial DDR4 memory stick gets hot while suspended.

How do you know it is getting hot (Have the rear cover off, through software...although I don't know of such a sensor)?  In any event, as far as ideas, did you order Crucial RAM that is certified by Crucial to work in the T470?  This is how I ordered my 16GB of RAM for the T470:

 

http://www.crucial.com/usa/en/compatible-upgrade-for//thinkpad-t470

 

 

jasoni26
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Message 4 of 15

Re: T470 - Crucial DDR4 memory stick gets hot while suspended.

Well, I think I used that to place my order for this (via Amazon). But now I see the part #'s don't match up.

 

What I got:

http://www.crucial.com/usa/en/ct16g4sfd824a

 

What the compatibility guide says I need:

http://www.crucial.com/usa/en/thinkpad-t470/CT9969996

 

But they kind of look identical, but perhaps not close enough.

 

jasoni26
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Message 5 of 15

Re: T470 - Crucial DDR4 memory stick gets hot while suspended.

> How do you know it is getting hot (Have the rear cover off, through software...although I don't know of such a sensor)?

 

The laptop was getting hotter when suspended than while running. So I took the back off, and just did some tests. It only takes a few seconds after entering suspend to feel the Crucial cheap heatup with your finger.

 

nibalo
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Message 6 of 15

Re: T470 - Crucial DDR4 memory stick gets hot while suspended.

Hi,

Is this problem solved now, or this CT16G4SFD824A module ram is still incompatible with Lenovo laptops such as T470?

jasoni26
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Message 7 of 15

Re: T470 - Crucial DDR4 memory stick gets hot while suspended.

Switched to Kingston memory and all is fine.

nibalo
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Message 8 of 15

Re: T470 - Crucial DDR4 memory stick gets hot while suspended.

So it doesn't mean that this Crucial module is working now, that's too bad :-/

jasoni26
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Message 9 of 15

Re: T470 - Crucial DDR4 memory stick gets hot while suspended.

Correct. I tried two modules from Crucial. Both the same part # though, but both from the T470 compatible selector provided by Crucial.

Someone else on Reddit said that Crucial got back to them with reporting that there was an "engineering" issue or something. Yeah, very little on detail. Crucial refunded my money without question.
nibalo
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Message 10 of 15

Re: T470 - Crucial DDR4 memory stick gets hot while suspended.

Yes so it still remains a mystery.

Thank you for your kind details jasoni26!

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