I have a similar setup (46" TV, 125% zoom, much newer hardware), and this problem is still relevant, even on the most current version of Chrome (47.0.2526.106). Thanks for identifying that it was zoom related. It turns out that it's a combination of zoom, and a fixed background image. If you disable the background image on the nexus site, everything is smooth again. One way to do this is with the Stylish extension. Create a single rule for all the nexusmods.com domains:
html, body {
background: #000000;
} This was exactly my problem except I'm not zoomed in chrome; I'm on a HiDPI display, which in windows 10, auto scales everything according to my dpi setting (200%). So, while chrome says I'm zoomed 100%, I'm actually zoomed 200%. Anyway, followed this advice and it worked perfectly.