topic Re: Intel Win11 Graphics Driver No High Refresh Rate(>60HZ) in Graphics

Intel Win11 Graphics Driver No High Refresh Rate(>60HZ)

Jeremy_Wu — Mon, 16 Dec 2024 20:26:08 GMT

I'm using Arc A750 in Windows11 24H2 but only one option 60Hz refresh rate there.

Win11-60Hz

Linux is OK on 2560*1600 @ 165Hz.

Linux-165Hz

How to enable 165Hz in Windows?

Re: Intel Win11 Graphics Driver No High Refresh Rate(>60HZ)

MUC — Tue, 17 Dec 2024 00:25:23 GMT

What happens when you enable Variable Refresh Rate Mode in Intel Graphics Software (if possible)?

Intel Graphics Software > Display > Scroll all the way down in the right pane:

The EDID only reports 60 Hz as the refresh rate. However, there is a FreeSync block that specifies 60 - 165 Hz.

Re: Intel Win11 Graphics Driver No High Refresh Rate(>60HZ)

Jeremy_Wu — Tue, 17 Dec 2024 09:18:28 GMT

It has no change no different whatever VRR and VRR Mode are. Just 60Hz.

VRR FullscreenVRR Fullscreen&WindowedVRR Mode DisabledVRR Disabled

Re: Intel Win11 Graphics Driver No High Refresh Rate(>60HZ)

MUC — Wed, 18 Dec 2024 00:22:22 GMT

Obviously there are differences in how the Windows and Linux drivers process the monitor's EDID. The EDID that this device sends is not entirely consistent.

The panel is a CSOT T3 MNG007DA1-1, which is a laptop screen. What cable did you use to connect this panel to the Arc A750?

Re: Intel Win11 Graphics Driver No High Refresh Rate(>60HZ)

Jeremy_Wu — Wed, 18 Dec 2024 21:58:02 GMT

You are right. I found the final blocks of EDID are different in Windows and Linux.

In Windows, Intel GCC Raw EDID:

00 FF FF FF FF FF FF 00 0E 6F 00 16 00 00 00 00
00 1E 01 04 B5 22 16 78 03 EE 95 A3 54 4C 99 26
0F 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 6E 6E 00 A0 A0 40 84 60 30 20
36 00 59 D7 10 00 00 18 00 00 00 FD 0C 3C A5 1F
1F 4E 01 0A 20 20 20 20 20 20 00 00 00 FE 00 43
53 4F 54 20 54 33 0A 20 20 20 20 20 00 00 00 FE
00 4D 4E 47 30 30 37 44 41 31 2D 31 0A 20 02 02

02 03 1D 00 E3 05 80 00 E6 06 05 01 6A 6A 24 6D
1A 00 00 02 03 3C A5 00 04 6A 24 6A 24 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF
02 03 1D 00 E3 05 80 00 E6 06 05 01 6A 6A 24 6D
1A 00 00 02 03 3C A5 00 04 6A 24 6A 24 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF

Linux is:

00 ff ff ff ff ff ff 00 0e 6f 00 16 00 00 00 00
00 1e 01 04 b5 22 16 78 03 ee 95 a3 54 4c 99 26
0f 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 6e 6e 00 a0 a0 40 84 60 30 20
36 00 59 d7 10 00 00 18 00 00 00 fd 0c 3c a5 1f
1f 4e 01 0a 20 20 20 20 20 20 00 00 00 fe 00 43
53 4f 54 20 54 33 0a 20 20 20 20 20 00 00 00 fe
00 4d 4e 47 30 30 37 44 41 31 2d 31 0a 20 02 02

02 03 1d 00 e3 05 80 00 e6 06 05 01 6a 6a 24 6d
1a 00 00 02 03 3c a5 00 04 6a 24 6a 24 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff

70 13 79 00 00 03 01 14 ac 2f 01 85 ff 09 9f 00
2f 00 1f 00 3f 06 83 00 02 00 05 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 37 90

I don't know why they are different. I just use a 16'' portable screen. There is an edp to minidp board inside it and using a minidp to DP cable connected to Arc A750.

Re: Intel Win11 Graphics Driver No High Refresh Rate(>60HZ)

MUC — Thu, 19 Dec 2024 00:10:03 GMT

Yes, the EDID read with Linux contains a third block that also defines the 165 Hz video timing (with 777 MHz pixel clock). But I can't get it to appear on my Windows device either.

With a bit of fiddling around, I can say that there seems to be a pixel clock limit of 600 MHz with this configuration on the Intel Windows drivers.

If the Linux EDID is changed to take this into account, then you can run

2560 x 1600 @ 101 Hz RGB 10-bit (475.82 MHz) or
2560 x 1600 @ 127 Hz RGB 8-bit with dithering (598.31 MHz)

on Windows.

Please try this on yours:

Download the EDID file attached
Download Custom Resolution Utility (CRU)
Run CRU.exe
Make sure the active EDID is CSO1600 connected to your PC. If necessary, select from the drop down menu.

Please close CRU with OK and restart the computer.

Note:
All changes made with CRU can be undone if necessary by running "reset-all.exe" from the CRU download package and restarting the system. You can find more information about this tool on the linked page.

Re: Intel Win11 Graphics Driver No High Refresh Rate(>60HZ)

Jeremy_Wu — Thu, 19 Dec 2024 03:47:03 GMT

Thank you！🤗The EDID_mod you provided works well at 127Hz on Windows.😄

127HZ

Then I thought and tried to copy paste the EDID from Linux and import it with CRU on Windows, 165Hz comes out.😂

165HZ

So it can run at the same 165Hz on Windows as Linux. 👏But manually...🤣

Re: Intel Win11 Graphics Driver No High Refresh Rate(>60HZ)

MUC — Thu, 19 Dec 2024 12:30:35 GMT

Ah, all the better! Then the pixel clock limit seems to be a phenomenon on my simulation environment only.