New RAM worked for only a week

[ssde1296]

I have installed a new RAM module on my Lenovo Thinkpad T450s.
The laptop comes with 4Gb soldered on the MoBo, at 1600MHz, DDR3L, with "PC3L-12800 Compliance". The Laptop has a free slot, so I decided to upgrade to 8Gb buying a 4Gb stick with the same exact specs (This one).
It worked flawlessy.
For a week. Then it died.
I couldn't even access BIOS. After unsuccessfully resetting CMOS battery I took off the RAM and it started working (almost) istantly.
Now, do I change the RAM stick or is possible that something else than a failure of the sitck itself happened? It seems weird to me that it broke in so little time.

 

[jojesa]

If you got it from Amazon or eBay, it could be a fake (counterfeit) module.
The sticker should have some holographic image otherwise is fake.
If the RAM chips do not have any data written on them, then the module is fake.

 

[smorizio]

use crucials memory advisior. try swapping the dead ram for a better brand. most laptops use the brand i listed as oem ram.

 

[ssde1296]

The Ram looks original in any way, and it's a kingstone. I guess I'll just try annother module and hope the problem was truly that ram chip.