Custom Resolution Utility (CRU)

[68k-dude]

Hello ToastyX o/ ,

I'm new to the Radeon software but having looked through the tabs I can see the GPU Scaling is turned off.

Having looked into it a bit more I am unable to create the 1600x1200@85 in the Create Custom Resolution feature in the Radeon software.

The limiting factor seems to be the Pixel Clock. 180MHz

I have noticed that the CRU has an edit function to edit the Pixel Clock limit.

I have tried to edit this value but it doesn't seem to stick.

Many thanks

68k

[ToastyX]

(04-14-2020 06:14 PM)68k-dude Wrote:  The limiting factor seems to be the Pixel Clock. 180MHz

I have noticed that the CRU has an edit function to edit the Pixel Clock limit.

I have tried to edit this value but it doesn't seem to stick.

CRU can't edit pixel clock limits, and the patcher doesn't patch DisplayPort limits. You might be better off finding an HDMI to VGA adapter instead.

[68k-dude]

Hello ToastyX o/ ,

OK Mod time then

The limit seems to be taken from the monitor itself. The EPROM data on it is being read by the driver. I can see model info, serial number, and some other attributes. Why there is a 180MHz limit in there I don't know.

I may try to prevent the driver from reading the data. Cut the PIN or put something on it to prevent the data from being read. I wonder if I could spoof it by putting an EPROM inside the DP to VGA adaptor. Hmmm, that would be a fun little job.

If I get anywhere I'll let you know

Many thanks

68k

[joevt]

(04-15-2020 12:05 AM)68k-dude Wrote:  The limit seems to be taken from the monitor itself. The EPROM data on it is being read by the driver. I can see model info, serial number, and some other attributes. Why there is a 180MHz limit in there I don't know.

I may try to prevent the driver from reading the data. Cut the PIN or put something on it to prevent the data from being read. I wonder if I could spoof it by putting an EPROM inside the DP to VGA adaptor. Hmmm, that would be a fun little job.

I doubt the issue is with the display (unless you've examined the EDID - you can post a copy here of the hex or binary)?

Which DP to VGA adapter are you using? There are many that can do up to 330 or 360 MHz even if they advertise only 1920x1200 60Hz.
https://hardforum.com/threads/24-widescr...1044556918

If you connect the adapter to a Mac and do the AGDCDiagnose command, you can find out what the max DisplayPort link rate and lanes is (info from the DPCD registers). I don't know if there's a Linux or Windows utility to get that info. 180 MHz (assuming 8 bpc) is the limit for 1 lane of HBR2 or 2 lanes of HBR. The Plugable.com USBC-VGA adapter uses 2 lanes of HBR2 which should support 360 MHz but tops out at about 330 MHz for me (product page says it supports 1920x1200@60Hz which is only 193 MHz, assuming GTF timing).

[morrowindmemes]

Hi, I tried the this app with my hd340 and could get the 72hz on my monitor but then i stuck at 165mhz limit. I applied the Ati/Radeon patch. It found many things to patch, ı patched them then restarted the pc and still couldnt pass the 165 mhz limit. Is there anything i am doing wrong or the this is the monitor limit? Btw im using my laptop with its hdmi output and my monitor's input is DVI-I Dual Link so im using a transmitter.

[68k-dude]

Hello joevt o/

That is an interesting bit of info. The 180MHz does sound like a single DP lane.

I had a rubbish old VGA extension cable that I ripped pin 12 from. It worked to prevent the driver from detecting the monitor but didn't resolve the issue.

Here is the adaptor I'm using. It worked with this monitor on my old GTX980. The 980 had mini DisplayPorts. I had to get a little full size to mini adaptor for the Radeon VII. I wonder it that adaptor is the issue.

https://www.amazon.co.uk/DisplayPort-Thu...op?ie=UTF8



Many thanks

68k

[ToastyX]

(04-15-2020 08:15 AM)morrowindmemes Wrote:  Hi, I tried the this app with my hd340 and could get the 72hz on my monitor but then i stuck at 165mhz limit. I applied the Ati/Radeon patch. It found many things to patch, ı patched them then restarted the pc and still couldnt pass the 165 mhz limit. Is there anything i am doing wrong or the this is the monitor limit? Btw im using my laptop with its hdmi output and my monitor's input is DVI-I Dual Link so im using a transmitter.

If the patch doesn't work, then there's nothing you can do.

[Erdbeere12]

Hello,
I have a 1920x1080 monitor (NVIDIA GPU) and I want to make it 2560x1080, so that 320 pixel on the right and 320 pixel on the left are off the monitor (not shown). Is that possible? And if yes, how? I tried some settings, but yet it doesn't work. To be honest, I dont have that much knowledge about doing things like that.
Sorry if that was already answered once, I tried the search function but didnt found something useful. I d be really happy if someone could explain it too me, so that I can make these settings.

[ToastyX]

(04-15-2020 06:11 PM)Erdbeere12 Wrote:  I have a 1920x1080 monitor (NVIDIA GPU) and I want to make it 2560x1080, so that 320 pixel on the right and 320 pixel on the left are off the monitor (not shown). Is that possible? And if yes, how? I tried some settings, but yet it doesn't work. To be honest, I dont have that much knowledge about doing things like that.

I don't know a way to do that.

[68k-dude]

Hello everybody o/,

Looking at the Radeon driver software there is a little section which details the current display link. Here is what it says about my display.

Current Link Settings - 2.7 Gbps x 2

Which I believe to be HBR DP V1 or V1.1

The Radeon VII seems to not like the DP to VGA adaptor or recognise it as a DP 1.3 device.

Not sure what to make of this.

I will buy a HDMI to VGA converter I think.

Does anyone know of a good OLED monitor?