Custom Resolution Utility (CRU)

[PhantomLeax]

Hello Toasty, hope you're having a nice week. I wanted to try overclocking my 240 Hz Monitor, I used the automatic option and the reduced timings but I was only able to get around +3 HZ increase. So I did a some manual timing using Nvidia Control Panel where at 1920x1080 I set all the porch and sync values there to 1 and reduce the "Total Vertical" to 1085 and managed to get 260 Hz. I tried reducing the "Total Horizontal" as well but even a single adjustment resulted in a black screen so I did not touch that. My question is, is there any downsides into using the method I did above? Keep in mind I don't need or use V Sync or G Sync, just wondering if there is any downsides and a way to maybe improve even further by lowering the Total Horizontal.