BenQ XL2720Z overclocked to 220Hz and 250Hz [SUCCESS!]
Posted: 17 May 2019, 13:10
It's quite simple, set the following timings:
Refresh rate: 220Hz
Active pixels: 1920, 1080
Front porch: 24, 3
Sync width: 32, 5
Total pixels: 1984*, 1094*
Polarity: Positive, Positive (unsure if changing this has any effect)
* Total pixel settings required may vary depending on GPU & cable used. If 1984/1094 introduces frameskipping, experiment with other values, such as 2005/1088 (while confirming 8-bit colour depth mode is still in effect when running at 165Hz.)
When you see the "Out of Range!" message, select one of the saved modes on the controller (1, 2, or 3), and the monitor reappears with the overclocked refresh rate.
It appears the 220Hz limit is due to the Pixel clock, at just under 480MHz, which is the DisplayPort limit for this monitor.
*insert disclaimer here about how this might reduce the life of your monitor*
Of course, Blur Reduction isn't as good as the VT 1500 tweak, but it's still quite reasonable. AMA Premium actually looks better than AMA High, and Strobe Utility settings are Persistence: 10, Crosstalk Area: 18.
My new daily driver is now 165Hz with the same timings, as this is the limit for 8-bit colour depth. I use 220Hz (6-bit colour depth) for gaming only.
Refresh rate: 220Hz
Active pixels: 1920, 1080
Front porch: 24, 3
Sync width: 32, 5
Total pixels: 1984*, 1094*
Polarity: Positive, Positive (unsure if changing this has any effect)
* Total pixel settings required may vary depending on GPU & cable used. If 1984/1094 introduces frameskipping, experiment with other values, such as 2005/1088 (while confirming 8-bit colour depth mode is still in effect when running at 165Hz.)
When you see the "Out of Range!" message, select one of the saved modes on the controller (1, 2, or 3), and the monitor reappears with the overclocked refresh rate.
It appears the 220Hz limit is due to the Pixel clock, at just under 480MHz, which is the DisplayPort limit for this monitor.
*insert disclaimer here about how this might reduce the life of your monitor*
Of course, Blur Reduction isn't as good as the VT 1500 tweak, but it's still quite reasonable. AMA Premium actually looks better than AMA High, and Strobe Utility settings are Persistence: 10, Crosstalk Area: 18.
My new daily driver is now 165Hz with the same timings, as this is the limit for 8-bit colour depth. I use 220Hz (6-bit colour depth) for gaming only.