Question Is this an identical RAM stick?

[sarcasticsnowman]

I currently have a DDR4-2666 that runs at 1333MHz. I don't really know what any of those numbers mean but I think I found one that is identical: https://www.amazon.com/Samsung-2666...8gb+ddr4+2666mhz+sodimm&qid=1575769099&sr=8-1
Could you verify that? Are they running at the same speeds and stuff?

 

[NightHawkRMX]

Can you show us a screenshot of the memory tab in CPUZ?

Upload it here imgbb.com
https://www.cpuid.com/softwares/cpu-z.html

 

[Third-Eye]

I'm betting it actually is 2666Mhz but is being displayed as 1333Mhz in whatever program is being used. It's laptop memory so it's even more likely to be running the correct speed. You would have to manually change it to 1333Mhz in the Bios if the bios even supports that.