I have no idea if it works. Search these forums to see if anyone has used that RAM in the Inspiron 5680. Many users around here buy RAM from Crucial. If they recommend RAM for a specific PC model, they guarantee it works or they take it back... If you plan to keep the existing 8 GB 2400 MHz RAM and just add another 8 GB, you should buy another 2400 MHz. Anything faster will only clock down to the speed of the slowest module. And never a good idea to mix RAM of different speeds in the same channel (matching color retention clips). If you plan to replace the existing 8 GB, you could get an 8 GB 2666 MHz module so in the future you could add another 8 MHz 2666 MHz and that pair will run at their full rated speed.
I bought a new 8 gb 2400mhz pc4-192000 1.2v for my system and it doesn't work when I put it in. My computer will boot but then my monitor will not display anything and I think my fans spin slower. I tried removing my original ram and putting my new stick but it still wouldn't work. Is my new ram stick faulty or am I doing something wrong. I put them both in the 2, 4 slots.
Inspiron 5680 New Ram Not Working