MP 1,1-5,1 144hz on 10.9.5 w/ GTX 780 (5,1)

[css4]

Is there any way to enable the DisplayPort port to go past 60hz at 1440p?

Its capable of it on newer versions of macOS (not sure when it gets the ability, but it works in mojave)

I’ve tried SwitchResX, but that reports the resolution as "invalid".

I’ve tried installing a newer web driver (334.01.03f11), as its newer than 10.9.5’s built-in driver (310.40.55f01), but enabling the webdriver in the sysprefs pane does not persist after rebooting. I tried adding nvda_drv=1 to my nvram, but it looks like that also gets reset on reboot.

Are there any other things to try?

 

[reader50]

Your GTX780 is a Kepler chip and should have DisplayPort 1.2 with enough bandwidth for 1440p at 144Hz. But that's only true when using 8-bit color. If you're using 10-bit HDR color, DisplayPort 1.2 falls short of the required bandwidth. And I'm not sure if Mavericks drivers understand 10-bit color.

So I suggest checking your color depth. That's all I've thought of.