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What's DOS?
Posts: 1
Registered: ‎01-07-2014
Location: USA
Message 1 of 9 (14,628 Views)

W540 Ram upgrade

What sort of RAM do I need to upgrade to 32GB?

Crucial shows a max of 16GB

http://www.crucial.com/upgrade/Lenovo-memory/ThinkPad+W+Series/ThinkPad+W540+%28Quadl+Core%29-upgrad...

802.11n
Posts: 308
Registered: ‎03-30-2011
Location: CA
Message 2 of 9 (14,604 Views)

Re: W540 Ram upgrade

It says right on the left: "Maximum Memory: 32GB"

You have to buy two of the 16GB kits and put in all 4 sticks.
Fanfold Paper
Posts: 37
Registered: ‎11-06-2013
Location: New York, USA
Message 3 of 9 (14,573 Views)

Re: W540 Ram upgrade

Another Question: Can I install 24gb of memory too? Or just 16 or 32?

802.11n
Posts: 308
Registered: ‎03-30-2011
Location: CA
Message 4 of 9 (14,567 Views)

Re: W540 Ram upgrade

Yes, you can install 2x8GB + 2x4GB for 24GB total, I did this in my W520 for a little while. For best performance you have to put each in a particular spot so that the 8's are paired and the 4's are paired. The hardware maintenance manual should indicate where to put them.
Fanfold Paper
Posts: 37
Registered: ‎11-06-2013
Location: New York, USA
Message 5 of 9 (14,564 Views)

Re: W540 Ram upgrade

So basically, you always have to use the 4 slots? None can be left empty?

802.11n
Posts: 308
Registered: ‎03-30-2011
Location: CA
Message 6 of 9 (14,561 Views)

Re: W540 Ram upgrade

[ Edited ]

No, you can have any number full/empty slots and any combination of RAM sticks but to take advantage of the (slightly increased speeds of) dual channel memory you need matched pairs.

Fanfold Paper
Posts: 14
Registered: ‎06-25-2015
Location: United States
Message 7 of 9 (3,841 Views)

Re: W540 Ram upgrade

[ Edited ]

Hi:

 

I am about to get a RAM upgrade for my W540 also --- from Crucial since that looks like faster RAM than you can find anywhere else (I am not en expert though).

 

I don't see the information about pairing in the manual. Do you have any other tips? I am willing to spend what looks like $150 to get 3 sticks to fill all the slots; but I want to be informed about the pairing and actually figure out what to get. (Plus they are out of stock on some options...)

 

I thought :[There is 1 8GB stick in there ...] but it might actually be 2 4GB sticks. I will have to look again.

 

Thanks for any pointers.

Community Moderator
Posts: 6,428
Registered: ‎01-01-2010
Location: US
Message 8 of 9 (3,834 Views)

Re: W540 Ram upgrade

You must have a quad-core processor to use all 4 slots



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.

I am not an employee or agent of Lenovo.
Guru
Posts: 730
Registered: ‎04-13-2012
Location: IS
Message 9 of 9 (3,825 Views)

Re: W540 Ram upgrade

Hi guys, I did a little hardware installation tutorial on the W540, with the SODIMM order here:


The Venerable ThinkPad W540 – A Journey in Multiple Parts

 

You can also see there what kind of RAM I'm using in mine, but I have 32GB installed and not

a single hiccup since I got it.

 

Cheers!

ThinkStation P500 - Xeon E5-1650v3/32GB // ThinkPad P70 - Xeon E3-1505M/32GB
ThinkPad W540 (20BG) - i7-4800MQ/32GB // ThinkPad W520 (4282-W4Q) - i7-2720QM/32GB
ThinkPad T450s (20BW) - i7-5600U/12GB // Yoga 900 - i7-6500U/8GB
ThinkPad T61 (7665-CTO) - T7700/4GB // ThinkPad T60p (8741-C2G) - T7400/4GB
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