so i still use my GTX 1070 and play 1440P, it is really struggling with newer games especially RDR2 to maintain a steady 60 FPS even on medium/low settings... is it better to buy the faster GTX1080TI or newer but slower RTX2070.. i have no intention of using RTX btw.. also i want to buy my card second hand since its cheaper and the GTX 1080TI is not sold new anymore. i have a i7 7700K