have the same laptop that you show here. try putting an ssd in the slot that you show has a cover and says ssd 2. the disk I put in was a 2 TB Adata Brand, Swordfish Line, Model ASWORDFISH-2T-C; PCIe Gen3x4, NVMe 1.3; M.2 2280. When I first installed it, it was hard for me to recognize it and when I did, the temperature shot up almost not letting it touch the part where one rests the hand and the battery life fell from 8 hours to 1 hour immediately. In the same way the charger is overheated. Do you have any idea why this could be happening? the problem is fixed by removing the ssd 2. Thanks in advance
You could open it up like in this video and have a look at the ram sticks. ECCs have an extra chip on the board or you could look up the ram model. Software-wise, afaik there isn't a "definitive" way. I'm sure you have googled this.
looking at a comment in this video: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Qz7pQaJfUbY.html - not everything is tool-less to upgrade like the primary RAM slots and SSD slot. - the video from the link i posted states everything can be upgraded.