Have seen the sticky on bottlenecking but a bit confused by it (not that techy). Should I really be upgrading my CPU as well if I get a GTX 1660 or will i still be able to get a noticeable benefit from sticking with my current i3-3220? I mainly stream retro games, but also play some modern games such as Two Point Hospital. I currently only have an ancient Radeon HD 7850 graphics card.