LG is launching its dual mode GX7 OLED monitor in the US, with refresh rates up to 720Hz. Based on LG Display's fourth-generation WOLED panel, the 26.5-inch 27GX790B can run at 540Hz in 1440p resolution, or an impressive 720Hz in a not-so-impressive 720p resolution. The dual mode option lets you switch between the 540Hz and [...]