Decided to upgrade from 16gb (2x 8gb) to 32gb (2x 16gb) RAM on my Acer vn7-593g-70u4 (Acer site says max capacity is 32GB for my SNID). Max frequency for my CPU is 2400Mhz but right now the faster chips are actually a bit cheaper so I went with a 3200Mhz that's listed as backward compatible with 2400Mhz. After installing both chips it would not turn on, no lights or anything. Plugged in the charger and got keyboard lights, fans running, but a black screen, as if there were no power to it. Swapped back in the old ram, everything worked perfectly with or without the charger. After some reading, I decided to try one old and one new chip to get it to boot and see if my system even recognizes it. Still nothing without a charger, but with the charger plugged in it boots and runs fine. It even uses the new 16GB chip along with the old 8GB chip. Shows 24GB in task manager, and I even booted the game I was upgrading for and got my ram usage above 16GB to confirm both chips were in use. Pics of CPU-Z and RAM packaging included in the link below. Not sure why XMP 2.0 is listed in CPU-Z when the packaging says XMP is not supported but I get the feeling the explanation for my problem may lie in those timings tables which are all faster than the fastest of my old 2400Mhz ram, despite the advertised compatibility with 2400Mhz.
https://photos.app.goo.gl/utmwYwBz1w4eRDCK7
https://photos.app.goo.gl/utmwYwBz1w4eRDCK7