3200 is unlikely to work on your laptop. Even if it works, it will downclock (run more slowly). Crucial indicates you may use 2400 or 2666, but it will downclock to the maximum supported by your system. That system maximum may be 2400, or it may be 2133 as stated in Dell's specifications. You could look up your processor on Intel's site, to see what maximum frequency it supports. If it is 2133, then that's the maximum. But, even if the processor can support higher speed, that still may not be possible if the system doesn't support it. In other words, your RAM cannot run at a frequency faster than the processor supports. But, your system may have a maximum that is less than what the processor might otherwise be capable of. Whenever touching components or working inside a computer, wear a grounded wrist strap, also called anti-static wrist strap, ESD wrist strap, or ground bracelet. It's a cheap and sensible precaution. Rest the laptop on an anti-static mat or at least a reasonable alternative such as corrugated cardboard. (Repeatedly touching a metal case part is not sufficient mitigation with modern components.)
I bought Crucial 16GB kit (2x8GB) DDR4-3200 ct2k8g4sfra32a. Will the 3200MHz frequency work on my computer or do I have to return the kit for a 2400MHz? My computer is 2133MHz.
Inspiron 15 3567, adding Crucial 3200MHz ram