Custom Resolution Utility (CRU)

[hannes69]

@Onore

Quote:Did you run 75Hz on your old HD4550?

My projector is 720p and it only supports refresh rates in the 30Hz - 60Hz region, so I´m using refresh rates of 47.952, 48.000, 50.000 and 59.940 Hz for judderfree playback of movies with the according framerates. I tested to let the projector downscale a 1080p movie to its native 720p resolution via HDMI connection and the GPU could do that, this was at a refresh rate of 50 or 60Hz, don´t remember exactly.
If it is possible to output 1080p @ 75 Hz I don´t know. It´s a rather old GPU, I will replace it with a more recent one e.g. a R7 250 because I use madVR renderer with heavy processing, the HD4550 is on its edge.
A R7 250 is available with passive cooling and draws maximum 65W, should be ok.

@ToastyX
Once again thanks for the provided links, I tested yesterday the calculator. It gives me around 10 resolutions for a given refresh rate, minimum one of these is accurate enough. And the driver restarter in 64bit works as well! So the workflow is much faster for me. With my new GPU which I will order these weeks I surely will find the right settings within one day. Superb!
Remark: I have made some interesting observations: The refresh rate is not always EXACT the same, it varies a little bit after a fresh booted machine. And the clock deviation of audio and video clock differs as well, it seems to be dependant on temperature. When booting the cold computer I have a deviation of the reference clocks of 82ppm, after 2 hours the value drops to 72ppm. So I take a resolution with a corresponding refresh rate just in the middle of the borderline values and it should be ok. If the thermal drift would be higher it wouldn´t be possible to set an accurate enough refresh rate...
Many thanks, your tools are really helpful for me, the CRU utility, the calculator and the restarter.
Hannes.