A:AnswerIt's my understanding that 2880 x 1620 is quite a bit higher resolution than 1080p. IMO, screen and resolution on this Asus is gorgeous. I'm very happy with this laptop, Here is a link to help understand the visual comparison. https://images.nvidia.com/geforce-com/international/comparisons/rise-of-the-tomb-raider/alt/rise-of-the-tomb-raider-nvidia-dynamic-super-resolution-interactive-comparison-001-1920x1080-vs-2880x1620.html
A:AnswerDDR4 and DDR5 are incompatible with each other. You will need to install DDR5. I purchased a 32GB stick of DDR5 and the install went well and it worked immediately. Good Luck!