Custom Resolution Utility (CRU)

[ToastyX]

(08-23-2015 01:23 PM)TuN Wrote:  I'm using Samsung SyncMaster T240, which uses native resolution 1920x1200 @ 60Hz

I saw in the monitor manual that I can use lower resolution at higher vertical frequency, and thought it would be useful for playing FPS games on my computer.

So I've decided to make a custom resolution 1280x1024 @ 75.025 Hz in CRU, since it doesn't allow me to select anything above 60 Hz when I right click on desktop -> Screen Resolution -> Advanced settings -> Monitor -> Screen refresh rate

The manual might be wrong, or it might only accept higher refresh rates with VGA. If the monitor supported those resolutions, they should be available by default. Make sure GPU scaling is disabled.

(08-23-2015 01:23 PM)TuN Wrote:  I open up CRU, go to Detailed resolutions, click Add, select Manual Timing, I've entered 1280 x 1024 and 75.025 Hz, but the Horizontal Frequency and Pixel clock values are completely different than the ones on the monitor manual, and I can't change them all, since they correspond to each other -> CRU setting

So the manual says I should use:
75.025 Hz, 79.976 KHz, 135 Pixel Clock Mhz

And the CRU / monitor uses:
75.025 Hz, 79.458 Khz, 114.42 Pixel Clock Mhz

Many of the lower resolutions in the manual correspond with the list of established resolutions. Try using the 1280x1024 @ 75 Hz under established resolutions. That should give the VESA standard timing.

For detailed resolutions, CRU doesn't have the VESA standard timing programmed into it, but you can enter it manually: http://tinyvga.com/vga-timing/1280x1024@75Hz

You'll have to enter 75.024 Hz because it's really around 75.02467 Hz. Samsung monitors usually aren't picky about the timing parameters, so if that doesn't work, then the monitor isn't allowing higher refresh rates.