Open the latches on both sides of the slot at the same time, and then remove the memory module Save the removed memory module for future use. Place the notched end of the new memory module toward the contact edge side of the memory slot, and insert the memory module into the slot at an angle of about 20 degrees. Lenovo only tested 128GB when they released this machine, but you can absolutely use larger edition, I believe at least 512GB would be good. Do not try to use SDXC card as a major source of your storage as your data may be dangerous bc SDXC is far. The Lenovo ThinkPad X240 is a powerful business laptop sporting a Core i5 Haswell CPU, a speedy solid-state drive, and a 12.5-inch IPS touch-screen display. You'll pay top dollar for this well. Re: 16GB memory for X240 #5 Post by jdrou » Thu Jul 24, 2014 9:37 pm With more ultraportable laptops having only one RAM slot available for upgrade I would certainly expect demand for higher-density modules to increase.

Lenovo ThinkPad X240 - 12.5' - Core i7 4600U - 8 GB RAM - 256 GB SSD - US overview and full product specs on CNET.

Hi all,
I'm considering buying an X240, mostly because of the screen resolution. One downside of the X240, is that it only accepts 1 single SODIMM, which to now were only available up to 8GB sizes. I do need more than that to process the datasets I use.
Has anybody tested these? Does the BIOS allow for 16GB?
http://www.intelligentmemory.com/dram-m ... 3-so-dimm/
They appear to have a module code IMM2G64D3(L)SOD8AG which appears to be the first 16GB, and can do DDR3-1600. They may become available by mid April at $300
This post suggests it won't work...
http://hardforum.com/showthread.php?t=1797721
On the other hand, it was 'undocumented' that 2 8GB sticks could be used in X2xx series back in the day..
Adding a bit more info
A person from intelligentmemory says that a Haswell machine will not work with these chips, unless a change of the memory reference code, which is part of the BIOS. It is not yet 100% sure if it can be fixed by a BIOS update or not. On March 10, 2014, they did have a customer make it work on an Ivybridge E by modifying the memory reference code. Lenovo could work with Intel, and change this code.
Any ideas? Any Lenovo and/or Intel folks around?
Best
sancatHi all,
I'm considering buying an X240, mostly because of the screen resolution. One downside of the X240, is that it only accepts 1 single SODIMM, which to now were only available up to 8GB sizes. I do need more than that to process the datasets I use.
Has anybody tested these? Does the BIOS allow for 16GB?
http://www.intelligentmemory.com/dram-m ... 3-so-dimm/
They appear to have a module code IMM2G64D3(L)SOD8AG which appears to be the first 16GB, and can do DDR3-1600. They may become available by mid April at $300
This post suggests it won't work...

Lenovo X240 How Many Memory Slots 1000

http://hardforum.com/showthread.php?t=1797721

Lenovo X240 How Many Memory Slots Upgrade

On the other hand, it was 'undocumented' that 2 8GB sticks could be used in X2xx series back in the day..
Adding a bit more info
A person from intelligentmemory says that a Haswell machine will not work with these chips, unless a change of the memory reference code, which is part of the BIOS. It is not yet 100% sure if it can be fixed by a BIOS update or not. On March 10, 2014, they did have a customer make it work on an Ivybridge E by modifying the memory reference code. Lenovo could work with Intel, and change this code.
Any ideas? Any Lenovo and/or Intel folks around?
Best
sancat