Custom Resolution Utility (CRU)

[ToastyX]

(06-07-2015 10:24 AM)maxwerks Wrote:  Dear forum, I have just purchased an LG49UB820v for use as second monitor with my Dell Precision M4700 FirePro M4000 windows 8.1 workstation, after verifying with AMD technical support that the hardware is capable of supporting 4k@60hz. Until hdmi 2.0 adapters are available I could live with 4k@30hz, however the AMD Catalyst Control Centre only lists 1080p. I tried creating a custom resolution in CCC but with a very odd result. Firstly I checked that I could create lower custom resolutions using CVT timing settings. Then I tried a 3840 X 2160 @ 30hz resolution with CVT timing. During verification CCC raises a message that the flat panel does not support this custom resolution. However CCC does not reject the custom resolution: it is shown as the current applied custom resolution also after restarting windows. Despite the applied custom resolution the display remains in 1080p mode. I wonder if in this situation I should next try CRU, or is there perhaps an extra adjustment I need to make in CCC ? As a total newbie I am grateful for any help with this issue.

If the hardware and driver supported 3840x2160, then you shouldn't have to add a custom resolution. It should just work. You should bug AMD technical support about this because they gave you bad information.

If the monitor already defines 3840x2160 @ 30 Hz, then CRU will not help. This would be a pixel clock limitation in the driver. I don't know if the pixel clock patch will work with the FirePro M4000, but it's worth a try: https://www.monitortests.com/forum/Threa...ck-Patcher