Custom Resolution Utility (CRU)

[JonnyRedHed]

(12-07-2013 09:27 PM)ToastyX Wrote:  

(12-07-2013 07:12 PM)JonnyRedHed Wrote:  So with this, I started out with adding in a new detailed 1080p@75hz entry into Custom Resolution Utility (CRU). Using the LCD reduced timing option.
Leaving the 'include extension block ticked', and then rebooted.

No entry in NV control panel for 75hz in the refresh drop down.

NVIDIA users must either uncheck "Include extension block" or import a custom extension block for custom resolutions to work.

(12-07-2013 07:12 PM)JonnyRedHed Wrote:  So following the last few forum pages I imported the hdmi.dat file, which then added two '**' next to the LG TV's entry. And rebooted, this time I had 75hz and it worked just fine... BUT, I had lost the LG TV's entry in the audio panel 'Playback devices' and therfore in Reclock also. I found this out hours later when sitting down to watch a movie. I assumed it was because of the 75hz entry messing with the EDID.

Audio support is defined in the extension block. You can include basic audio support by importing this extension block: https://www.monitortests.com/hdmi-audio.dat

(12-07-2013 07:12 PM)JonnyRedHed Wrote:  I did try deleting the 75hz entry from Custom Resolution Utility (CRU), and rebooted, but that didnt work, so I then ran the reset-all.exe which still did not work. So I stripped off the NV driver and then the HD audio and rebooted and re-installed. This did work.

Running reset-all.exe and rebooting should have restored audio. I don't know why it wouldn't.

(12-07-2013 07:12 PM)JonnyRedHed Wrote:  So not wanting this to happen again, I tried something - I tried just creating a NV custom resolution of 1080p@75z and testing it, it tested fine, and then I tested up to my limit which is 79hz. But settled for creating a custom 75hz resolution. 1080p @ 75hz - Pixel clock=185.625Mhz.

I did even try to copy over from the CRU the LCD reduced timing settings, but the NV control custom resolution section does not have all the setting fields the CRU has, so I could only for my test get the pixel clock to 179.00 using manual. I opted for the automatic, 1080p @ 75hz.

The NVIDIA control basically has the same settings. It just uses total pixels instead of back porch or blanking. I put radio buttons in the detailed resolution dialog to show that only one field is needed to calculate the other two.

At some point, NVIDIA fixed HDMI support so you can add custom resolutions beyond 165 MHz in the control panel without the patch, but if you use the NVIDIA control panel instead of CRU, some games won't use the higher refresh rate.

With CRU and NVIDIA GPUs, if you're using HDMI and you import that extension block, you don't have to worry about the 165 MHz limit, so you shouldn't need the patch or the "LCD reduced" timing option. The TV won't get damaged from running at a higher pixel clock.

Hi Toasty,


After testing my setup, LG TV - HDMI, added two new rez in 1080p @ 75 and 1440p @ 75 - imported hdmi-audio.dat and left custom block ticked. Both 1080p@75 and 1440p@75 shows up in the games, tested with AC4: Black Flag.

that when switching refresh rates either manually or from MadVR automatic refresh rate changer, when changing back to native 1080p @ 60hz the NV control panels change resolution pane often switches the bit depth to 16bit colours and I have to change it back to 32bit sometimes.