No, identical RAM is not necessary.
No, identical RAM is not necessary.
You might face some compatibility challenges when trying to add a different stick, especially if it's not the exact model. Since your laptop uses integrated graphics, ensure the new stick matches the system requirements. Also, confirm availability of the 2133MT 8GB DDR4 slot on your PC.
RAM doesn't need to match exactly, no matter what some say. Speed and odds will work well, especially at 2133MHz.
I'm using both Trident Z Royal and Trident Z Black and White models, both at 3200C14. They work well together, but each has its own strengths—some might not see a big difference, but that's not what matters.