NVIDIA Pixel Clock Patcher

[ToastyX]

(12-09-2020 08:57 PM)Margatroid Wrote:  Hey, just wanted to share a couple issues I have with 1.4.13. I just got a 3080 this week, and I'm using it with my old Overlord 1440 monitor with an Startech Displayport to Dual Link DVI Active adapter. I'm also using an LG C9. I found that the pixel clock patcher unfortunately seems to break the way the drivers work with the C9--I could get 4k 120hz to work, but whenever I tried to switch to another resolution or refresh rate I would just get a black screen. Undoing the patch fixed this. I also had issues where if restarted my video drivers on the Overlord monitor with the patch installed, I got stuck on a black screen and had to restart Windows.

Also, the patcher unfortunately does not even allow me to use 120hz on the Overlord monitor. I made a setting for 64hz which works, but 120 won't show up on the drop-down menu options under advanced display properties. So it seems this patcher just isn't working at all with RTX series cards, at least not on the driver I'm using, which is 457.51.

Do you think maybe the Displayport to DVI-D adapter is causing problems? I've read in reviews that other people have been able to get 1440 120hz with it, but I wonder if somehow it's preventing Windows from recognizing that my specific monitor can do 120hz. In any case, it seems like this version of the patcher isn't going to work with current RTX drivers because of the blackscreen issues.

The patcher does not affect DisplayPort limits. I don't know why it's affecting the C9 because the patcher doesn't change any HDMI 2.x limits, but you shouldn't need the patcher with that adapter anyway. You have to keep the pixel clock under 476 MHz, and that's with 6 bpc color. The limit for 8 bpc color is 357 MHz.