Nvidia's hotfix addresses issues users have been having with certain 4K panels
There are some growing pains associated with 4K displays, at least for PCs. Quirky issues tend to pop up due to the way the technology works. To run a 4K panel at 60Hz, you need to use a DisplayPort cable, which supports the refresh rate using Multi-Stream Transport (MST). However, this essentially treats a 4K panel as two displays, which introduces weird side effects. A new hotfix from Nvidia is intended to address these issues.