Currently my sons computer has an I7 9700(k? maybe?) and a 1660 ti GPU, It only had 460 PSU, and we just got a 850w PSU so it can support a better GPU, and I want to know what would give the best performance without creating a bottleneck. I will be putting it in soon so I am going to have to measure the space for the card, since I know they use some weird custom sized cards sometimes. He only games at 1080p and his current setup has been serving him well, but I want it to be a little better for him. Thanks for any and all advice.