Yes, according to Dell specifications, that configuration was tested and approved. However, only 8 GB will be in dual channel mode, while 4 GB will be in single channel mode. And, sometimes mismatched RAM brands/models may not play well together, which is why a matched pair of two identical RAM modules is usually recommended. And here is Crucial RAM guaranteed compatible with your laptop. 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.)
My inspiron 3593 has 4gb ddr4 2667mhz ramcan i setup another 8gb ddr4 2666mhz ram?can use both ?
Ram Upgrade