If anyone can shed some light on this, I’d really appreciate it.
I ran into a very strange problem with my Thinkpad L380 recently.
The laptop originally came with a single 8 Gb stick of DDR4 memory, which I supplemented with an additional PNY 8 Gb module (From Best Buy) after a few months of owning it.
Fast forward a year and I purchased a Lenovo Legion 5i to replace my gaming desktop. Again, this machine came with an 8 Gb module.
I decided to move the extra 8 Gb from my L380 to the Legion laptop since the latter would probably benefit more from the extra memory.
Eventually, I went out and bought another 8 Gb PNY stick from Best Buy to bring my Thinkpad up to 16 Gb again. I installed the module, pressed the power button and got an error code saying there was a problem with the memory. Thinking it was just a bad module, I returned to best buy, exchanged it for another stick (same sku) and put the new one in my Thinkpad, which again, wouldn’t turn on and threw a memory error.
Tried the new module alone, in both slots of the Thinkpad, no dice.
But then I tried it in the Legion for gits and shiggles and the thing worked perfectly.
So, TL/DR (I don’t blame you): A known good memory module identical to one that works in this computer doesn’t seem to be compatible.
The PN for the module that doesn’t work in the thinkpad is 8GBU2X04JGGG39-12-K
The PN one that does is 8GBU1X08JGGG39-12-K
Both are 8GB DDR4 2400 PC4-19200 CL-17-17-17-39 1.2V DIMMs and both work in the Legion 5i
They were bought about a year and a half apart.
