ThinkPad E550 doesn't detect RAM upgrade

kennethv

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Dec 22, 2013
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[UPDATE] : I found the solution to this problem on another forum. Another person was as confused as I was by the 1.5V indicators on the ram slots. He found out the notebook really requires DDR3L which need 1.35V.


I received my new ThinkPad E550 yesterday. It has 4GB PC3-12800 DDR3L SDRAM 1600MHz SODIMM.

Then I bought this Kingston RAM: 4GB PC3-12800 which is DD3. I know my notebook should support this one because when I open the back, it clearly indicates both RAM slots have 1.5V.

When I open Speccy I get this:


It's clear my notebook detects both RAM cards but Windows does not:


What is the problem here? I have 64-bit Windows 7 Professional.
 

kennethv

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Dec 22, 2013
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How is it Speccy detects 8GB while Windows only detects 4GB? It doesn't make sense to me. Both my DDR3 and DDR3L cards are getting enough voltages (1.5V).
Me = confused.
 

Quixit

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Dec 22, 2014
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Does Lenovo will only allow you to install specifically whitelisted RAM modules? I know this was an issue a few years ago so it might be worth looking into.
 

fisco

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Mar 14, 2013
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It's not ok to mix ddr3l with ddr3 memory. It works on some mobos , but you will get higher temperatures and likely system faliures
 
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