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The Lenovo ThinkPad X390 is a business laptop intended for professional use.

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How to change the Ram?

My Laptop has 16 gb, But I need 32 gb. So now is my question how to change it?

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@sebastianw89314 here is the bad news. The RAM is soldered to the motherboard and can't be upgraded. If anything, you will need to find a motherboard with 32GB installed.

Now, contradicting myself :-) if you have board level experience and know how to solder BGA IC's you could change the IC's by desoldering the 16GB and replace those with 32GB modules. Remember they are BGA IC's and those require some special tools etc.

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Hi @oldturkey03,

This model can have 32GB of optane memory on an M.2 PCIe NVMe card (for total of 40GB I think) but not knowing much about optane I left it alone.

I think that @nick will be more au fait with this than I am

Not disparaging what you know about this at all :-)

Cheers

@jayeff it's my understanding that optane memory is tied to the storage device i.e. SSD and provides accelerated data access but does not increase any RAM or has any direct influence on the system RAM. ¯\_(ツ)_/¯ :-)

@oldturkey03

As I said I know little about it but when I did a quick check on optane memory for this model it showed 32GB on an M.2 NVMe card which is a bit small for storage these days so I thought perhaps it is using it as "cache" for the main storage drive which may simulate what having more ram does

Cheers

@jayeff @oldturkey03 covered the RAM, I covered the Optane drive.

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Don't bother with Optane, even if it works. Much like Apple's Fusion Drive, it was a bridge product meant to buy time until SSDs became affordable. I bought a Dell with this setup and when I got it in, I just about immediately took out the Optane drive and put a 256GB NVMe boot SSD in place at that time (512GB+ was still somewhat pricey, and the machine came with a 1TB HD). Time made wasting a second on that setup pointless.

That said, as long as the BIOS supports it and you have a compatible processor (minimum is 8th gen) AND a compatible SSD (Intel stopped making new ones, so you have to buy used ones now), it should work if you want to use it. However, it requires a spinning hard drive as it works in conjunction with it. They are not standalone drives and cache frequently used programs and Windows boot files. It doesn't speed up the entire system, just frequently used programs. In addition, it's automatic without any manual override options.

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