5k Resolution with original iMac Panel and Nvidia Card

[joevt]

I tried several Custom Resolution settings. 31hz, 46hz. It doesn't work. When I apply the new create setting after a restart my screen turns black. It took me some time to get the Picture back.

You should enable Screen Sharing on the Hackintosh, then use a second Mac to connect to your Hackintosh and Share Screen. This way, you can choose different resolutions without worrying that the screen will become black.

I attached a zip, which contains a Video to show you the Panel Settings.

Very good video. You can go through the menus as fast as you like, and I can view frame by frame in QuickTime Player.app using the left and right arrow keys.

"2P LR" mode might be interesting. I've never seen "2P TB" before. See if those modes will change the EDID reported by port D0 and D1 in the AGDCDiagnose output. This might allow dual cable connection for 5K60Hz 10bpc RGB. See what it does with Nvidia (choose a 2560x2880 60Hz resolution for each side). Then try two connections to the iGPU. Which motherboard do you have? Some don't have two DisplayPort outputs for iGPU. Do you have a Mac to test with?

"2P LR" might only be good for displaying two different pictures side by side.

There is a "DP 1.3" and "DP 1.4" option for "D0" and "D1" and you have "DP 1.4" selected, but it doesn't show up in the AGDCDiagnose output. I wonder what those options are for then?

I don't understand what "DP MST" is for. Is it to change the "D0" or "D1" port into an output port to chain a second display? If so, then what is the "MST/SST" port for?

I wonder if changing "DP Resolution" changes the EDID?

I wonder what "Auto Select" does in "Input"?

Here are the onscreen menu items that I see. "?" indicates possible missing information.

Spoiler: Onscreen Menu Items

1) Display Mode
    √ 1P
    2P LR
    2P TB
    2P PIP
    ?
2) Display Function
    1 Disp Rotate
        ?
    2 Latency
        ?
    3 Freeze
        ?
3) Select Region (disabled)
4) Picture
    1) Backlight
        ?
    2) Brightness
        ?
    3) Contrast
        ?
    4) Sharpness
        ?
5) Analog
    1) Auto Adjust
        ?
    2) H Position
        ?
    3) V Position
        ?
    4) Clock
        ?
    ?
6) Color
    1) Panel Uniformity
        ?
    2) Gamma
        ?
    3) Temperature
        ?
    4) Color Effect
        ?
    ?
7) Advance
    1) Aspect Ratio
        √ Full
        16:9
        4:3
        5:4
        ?
    2) Overscan
        ON
        √ OFF
    3) Over Drive
        1 ON/OFF
            ?
        2 OD Gain
            ?
    4) DDCCI
        √ ON
        OFF
    5) Ultra Vivid
        √ OFF
        L
        M
        H
    6) DP Option
        1) D0
            1.1
            1.2
            1.3
            √ 1.4
        2) D1
            1.1
            1.2
            1.3
            √ 1.4
        3) D6 (disabled)
    7) DP MST
        √ OFF
        D0
        D1
        D6 (disabled)
    8) DP Resolution
        1) D0: DP
            1080p
            2560x1440
            √ 4K2K@60Hz
        2) D1: DP
            1080p
            2560x1440
            √ 4K2K@60Hz
        3) D2: HDMI
            ?
        4) D3: HDMI
            ?
        5) ?
        6) ?
        7) ?
        8) ?
    9) Clone
        OFF
        √ ON
    10) Free Sync2
        ON
        √ OFF
    11) HDR
        1) Ultra HDR Mode
            ?
        2) Dark Enhance
            ?
        3) Sharp Enhance
            ?
        4) Contrast
            ?
8) Input
    ?
    A0: NONE
    D0: DP
    √ D1: DP
    D2: HDMI
    D3: HDMI
    D4: NONE
    D5: NONE
    D6: NONE
    D7: DP
    Auto Select
9) Audio
    1) Volume
        ?
    2) Mute
        ?
    3) Stand Along
        ?
    4) Audio Source
        ?
    ?
10) Other
    1) Reset
        ?
    2) Menu Time
        ?
    3) OSD H Position
        ?
    4) OSD V Position
        ?
    ?
11) Information
    D1: DP
    [email protected]
    H: 88.3 KHz PCLK: 466.0MHz
    HDCP 2.2 Enabled Sink
12) Factory

I found some manuals for displays that use a similar menu system.
USER MANUAL FOR KT-E240F.pdf
TF6537UHSC-usermanual-e-revD.pdf
SVX-4096-2x-manual-rev230-01mar2018.pdf

I changed the numbers in the Frequency area.

Looks good.

This are my Settings in the Custom Resolution. Are they ok?

You need to select the checkbox for "Use simplified settings" and select the timing calculation option of "CVT-RB". Recreate all the timings for 5120x2880 for refresh rates between 30 and 60Hz. Save changes. Restart. Retest.

The Controller Board did not come with the Panel. The Controller Board is from AliExpress and I can't send it back.
There was another one, which required using two DP cables to achieve 5K. The Seller told me, that he would recommend the never one (that, that I have now) because its DP 1.4 and much more reliable.

We haven't seen any DP 1.4 capability yet.

Is there anything I can do or try? I would prefer to have 60hz (or maybe 46) instead of 30
everything feels a little bit slow and not as smooth as i know it from my 4K display.

I would retry all the refresh rates between 30 and 60Hz (make sure they are calculated using CVT-RB). Use "Share Screen" to make this easier.

How can I achieve Option 3? DisplayPort 1.2, HBR2, 8 lanes: 5K 60Hz 10bpc RGB

Set Display option to "2P LR", connect both D0 and D1. Set resolutions of both displays to 2560x2880 60Hz. Get AGDCDiagnose output.

Do you think the patch for the Nvidia Card will work? How does the patch work or where can I find it?

The patch is discusses at https://www.tonymacx86.com/threads/nvidia-gtx-1080-lg-ultrafine-5k-full-5k-60hz-success.240730/ . There are additional links there. I would not try this without successfully getting a two cable connection with AMD or Intel graphics.

Other things to try:
1) Set "DP option" to "DP 1.3" for D0 and D1 and retest refresh rates for D1. Get AGDCDiagnose output and compare.

2) Set input to D0 and retest.

 

[Arstidir]

You should enable Screen Sharing on the Hackintosh, then use a second Mac to connect to your Hackintosh and Share Screen. This way, you can choose different resolutions without worrying that the screen will become black.

Good Idea, I will do that.
And I will try all Hz settings between 30 ans 60Hz. might take a while.
I´m at work now, Will do it today evening.

There is a "DP 1.3" and "DP 1.4" option for "D0" and "D1" and you have "DP 1.4" selected, but it doesn't show up in the AGDCDiagnose output. I wonder what those options are for then?

I asked myself that too.
If I try something else then 1.4, nothing changed. But 1.3 doesn't work. I don't have a Picture.

I wonder what "Auto Select" does in "Input"?

It selects the one that gives a signal. Its not really helpful.

Im in a German Hackintosh Forum too and there is a guy who has the same Panel and the Same Controller Board.
He achieved 5K with 60hz just using switchResX. He is using a Sapphire AMD Radeon RX 580 Pulse OC 8GB.
So i am considering to buy a radeon rx 570 with 4GB. I found one in a lokal store. If it doesn't work I can give it back.
I don't need Power in macOS, the 1070 is just for Gaming in Windows.
The plan is to deactivate the 1070 in macOS and just using the AMD Card. Then I will be able to install Mojave and Catalina. What do you think? Is that better/easier to achieve 5K 60hz?
Having to cards but just using one in macOS should work I think.

My Motherboard is a GA-Z170M-D3H

GA-Z170M-D3H (rev. 1.0) Overview | Motherboard - GIGABYTE Global

Lasting Quality from GIGABYTE.GIGABYTE Ultra Durable™ motherboards bring together a unique blend of features and technologies that offer users the absolute ...

www.gigabyte.com

Here is a Picture from his Computer:

 

[joevt]

Im in a German Hackintosh Forum too and there is a guy who has the same Panel and the Same Controller Board.
He achieved 5K with 60hz just using switchResX. He is using a Sapphire AMD Radeon RX 580 Pulse OC 8GB.

We don't know what pixel format he is getting from the display. I would like to see AGDCDiagnose output for that. And a picture of the timing from SwitchResX for the working resolution.

So i am considering to buy a radeon rx 570 with 4GB. I found one in a lokal store. If it doesn't work I can give it back.
I don't need Power in macOS, the 1070 is just for Gaming in Windows.
The plan is to deactivate the 1070 in macOS and just using the AMD Card. Then I will be able to install Mojave and Catalina. What do you think? Is that better/easier to achieve 5K 60hz?
Having to cards but just using one in macOS should work I think.

AMD is better supported in macOS so maybe it will work better.

My Motherboard is a GA-Z170M-D3H

GA-Z170M-D3H (rev. 1.0) Overview | Motherboard - GIGABYTE Global

Lasting Quality from GIGABYTE.GIGABYTE Ultra Durable™ motherboards bring together a unique blend of features and technologies that offer users the absolute ...

www.gigabyte.com

Your motherboard has zero DisplayPort outputs. They wasted the three DisplayPort outputs of the iGPU with inferior VGA, DVI, and HDMI. You have no way to test Intel graphics with that motherboard.

Have you tried a HDMI 2.0 connection? HDMI 2.0 has enough bandwidth to allow 5K 60Hz YCbCr420 10bpc. It's not as good as DisplayPort 1.2's YCbCr422 8bpc or DisplayPort 1.3's RGB 8bpc.

 

[Arstidir]

I was at the store after work and bought a Asus Radeon 570 with 4GB.
But I can't get 5k 60Hz with that card too
The limit is still 30Hz. If I choose anything higher, a don't have a Picture. Thanks for the advice with screen Sharing!

Yes I tried HDMI 2.0 too. only 30Hz. With both cards.
Where can I configure this? YCbCr420 10bpc ? Is this CVT-RB ?

 

[joevt]

I was at the store after work and bought a Asus Radeon 570 with 4GB.
But I can't get 5k 60Hz with that card too
The limit is still 30Hz. If I choose anything higher, a don't have a Picture. Thanks for the advice with screen Sharing!

Show me a screenshot of the 45Hz timing information from SwitchResX.

Where can I configure this? YCbCr420 10bpc ? Is this CVT-RB ?

I don't think there is anyway to change the pixel format in macOS. YCbCr is a different color space than RGB. 420 is the 4:2:0 chroma subsampling mode (chroma subsampling modes reduce bits per pixel by sharing the same CbCr values with adjacent pixels).
10bpc is 10 bits per component. A component is Red, Green, Blue, Y (Luminance), Cb (complementary blue), Cr (complementary red).

Maybe you can override the EDID so that it force YCbCr 4:2:2 or 4:2:0 mode. Take the current EDID, remove options for RGB and 4:4:4 and save changes. Convert to hex text using "xxd -p" and add it to the override file as an "IODisplayEDID" element. You can find examples of "IODisplayEDID" in other override files.

CVT-RB is a method to calculate front porch, sync width, and back porch for horizontal and vertical blanking periods in a custom resolution. Other methods are GTF (used for CRTs), and CVT. RB means "reduced blanking" which means the blanking periods use less pixels. Select "CVT-RB" when creating custom resolution in SwitchResX for LCD displays.

 

[Arstidir]

Show me a screenshot of the 45Hz timing information from SwitchResX.

Do you mean this?

After a restart 45Hz is not valid. I can't apply it. But I was able to get 5K & 37Hz with the AMD Card and the HDMI cable.

Maybe you can override the EDID so that it force YCbCr 4:2:2 or 4:2:0 mode. Take the current EDID, remove options for RGB and 4:4:4 and save changes. Convert to hex text using "xxd -p" and add it to the override file as an "IODisplayEDID" element. You can find examples of "IODisplayEDID" in other override files.

Sorry, I really didn't get this part. I never had anhing to do with the Terminal, this is completely new for me.

I created a EDID file with SwitchResX
Its in the Spoiler. Should I delete the red parts?

Spoiler: HDMI UHD HDR

EDID report generated by SwitchResX Version 4.9.0 for display HDMI UHD HDR


-----------------------------------------------------
------------------- RAW DATA ------------------------
-----------------------------------------------------
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
-----------------------------------------------------
0 | 00 FF FF FF FF FF FF 00 4A 8B 32 BC 01 01 01 01
1 | 09 1A 01 04 A2 3C 22 78 3E 27 15 AC 51 35 B5 26
2 | 0E 50 54 BF EF 80 D1 C0 D1 E8 D1 FC 95 00 90 40
3 | 81 80 81 40 81 C0 40 D0 00 A0 F0 70 3E 80 30 20
4 | 35 00 54 4F 21 00 00 1A 00 00 00 FC 00 48 44 4D
5 | 49 20 55 48 44 20 48 44 52 0A 46 37 80 B4 70 38
6 | 2D 40 2C 16 35 00 54 4F 21 00 00 1A 00 00 00 FD
7 | 00 30 3C 86 86 36 01 0A 20 20 20 20 20 20 02 CE

-----------------------------------------------------
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
-----------------------------------------------------
0 | 02 03 51 F2 5E 04 05 10 13 14 1F 20 21 22 27 48
1 | 49 4A 4B 4C 5D 5E 5F 60 61 62 63 64 65 66 67 68
2 | 69 6A 6B E2 00 D5 E3 05 C0 00 23 09 7F 07 E5 0F
3 | 00 00 0C 00 6D 03 0C 00 10 00 38 78 20 00 60 01
4 | 02 03 67 D8 5D C4 01 78 88 01 E6 06 05 01 69 69
5 | 4F E8 E4 00 50 A0 A0 67 50 08 20 98 04 55 50 21
6 | 00 00 1E 88 5E 00 A0 A0 A0 2D 50 16 2C 35 00 55
7 | 50 21 00 00 1E 00 00 00 00 00 00 00 00 00 00 82

-----------------------------------------------------
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
-----------------------------------------------------
0 | 70 11 38 03 00 03 00 28 AA 04 01 00 FF 13 9F 00
1 | 2F 80 1F 00 3F 0B 3A 00 02 00 04 00 F8 10 01 00
2 | FF 13 9F 00 2F 80 1F 00 3F 0B 3C 00 02 00 04 00
3 | 0B 00 0A 53 77 69 74 63 68 52 65 73 58 B4 00 00
4 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
5 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
6 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
7 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 90

-----------------------------------------------------
< 00FFFFFF FFFFFF00 4A8B32BC 01010101 091A0104 A23C2278 3E2715AC 5135B526 0E5054BF EF80D1C0 D1E8D1FC 95009040 81808140 81C040D0 00A0F070 3E803020 3500544F 2100001A 000000FC 0048444D 49205548 44204844 520A4637 80B47038 2D402C16 3500544F 2100001A 000000FD 00303C86 8636010A 20202020 202002CE 020351F2 5E040510 13141F20 21222748 494A4B4C 5D5E5F60 61626364 65666768 696A6BE2 00D5E305 C0002309 7F07E50F 00000C00 6D030C00 10003878 20006001 020367D8 5DC40178 8801E606 05016969 4FE8E400 50A0A067 50082098 04555021 00001E88 5E00A0A0 A02D5016 2C350055 50210000 1E000000 00000000 00000082 70113803 00030028 AA040100 FF139F00 2F801F00 3F0B3A00 02000400 F8100100 FF139F00 2F801F00 3F0B3C00 02000400 0B000A53 77697463 68526573 58B40000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000090 >

-----------------------------------------------------
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-----------------------------------------------------
Valid EDID block #0: checksum ok
Valid EDID block #1: checksum ok
Valid EDID block #2: checksum ok

-----------------------------------------------------
------------------- MAIN EDID BLOCK -----------------
-----------------------------------------------------

EDID Version........1.4
Manufacturer........RTK (4A8B)
Product ID..........48178 (BC32)
Serial Number.......01010101

Manufactured........Week 9 of year 2016
Max H Size..........60 cm
Max V Size..........34 cm
Gamma...............2,20

Display Supported Features:
---------------------------
Power Management: Active off


Display type:
-------------
RGB 4:4:4 & YCrCb 4:4:4 & YCrCb 4:2:2 Color Encoding Formats
Display is non continuous frequency
Default color space is sRGB standard
Preferred timing mode includes Native Pixel Format


Input signal & sync:
--------------------
Digital Input
8 Bits per Primary Color
HDMI-a interface


Color info:
-----------
Red x = 0,672 Green x = 0,208 Blue x = 0,148 White x = 0,313
Red y = 0,318 Green y = 0,710 Blue y = 0,056 White y = 0,329

Established Timings:
--------------------
720 × 400 @ 70Hz
640 × 480 @ 60Hz
640 × 480 @ 67Hz
640 × 480 @ 72Hz
640 × 480 @ 75Hz
800 × 600 @ 56Hz
800 × 600 @ 60Hz
800 × 600 @ 72Hz
800 × 600 @ 75Hz
832 × 624 @ 75Hz
1024 × 768 @ 60Hz
1024 × 768 @ 70Hz
1024 × 768 @ 75Hz
1280 × 1024 @ 75Hz

Manufacturer Reserved Timings:
------------------------------
1152 × 870 @ 75Hz

Standard Timing Identification:
-------------------------------
#0: 1920 × 1080 @ 60Hz (D1C0)
#1: 1920 × 1080 @ 100Hz (D1E8)
#2: 1920 × 1080 @ 120Hz (D1FC)
#3: 1440 × 900 @ 60Hz (9500)
#4: 1400 × 1050 @ 60Hz (9040)
#5: 1280 × 1024 @ 60Hz (8180)
#6: 1280 × 960 @ 60Hz (8140)
#7: 1280 × 720 @ 60Hz (81C0)

Monitor Description blocks:
---------------------------
Descriptor #0 - Timing definition:
Mode = 3840 × 2160 @ 59,982Hz
Pixel Clock............. 533,12 MHz Non-Interlaced

Horizontal Vertical
Active.................. 3840 pixels 2160 lines
Front Porch............. 48 pixels 3 lines
Sync Width.............. 32 pixels 5 lines
Back Porch.............. 80 pixels 54 lines
Blanking................ 160 pixels 62 lines
Total................... 4000 pixels 2222 lines
Scan Rate............... 133,280 kHz 59,982 Hz

Image Size.............. 596 mm 335 mm
Border.................. 0 pixels 0 lines

Sync: Digital separate with
* Negative vertical polarity
* Positive horizontal polarity

Descriptor #1 - Monitor name:
HDMI UHD HDR

Descriptor #2 - Timing definition:
Mode = 1920 × 1080 @ 59,894Hz
Pixel Clock............. 141,50 MHz Non-Interlaced

Horizontal Vertical
Active.................. 1920 pixels 1080 lines
Front Porch............. 44 pixels 3 lines
Sync Width.............. 22 pixels 5 lines
Back Porch.............. 114 pixels 37 lines
Blanking................ 180 pixels 45 lines
Total................... 2100 pixels 1125 lines
Scan Rate............... 67,381 kHz 59,894 Hz

Image Size.............. 596 mm 335 mm
Border.................. 0 pixels 0 lines

Sync: Digital separate with
* Negative vertical polarity
* Positive horizontal polarity

Descriptor #3 - Monitor limits:
Horizontal frequency range.......134-134 kHz
Vertical frequency range.........48-60 Hz
Maximum bandwidth range..........540 MHz
Range Limits Only


-----------------------------------------------------
------------ EXTENSION EDID BLOCK 1 ---------------
-----------------------------------------------------

CTA-EXT: CTA 861 Series Extension:
----------------------------------
Revision:...........................3
First DTD block at offset...........77
Display Supports:
Underscan on PC modes
Basic audio
YCbCr 4:4:4
YCbCr 4:2:2

Data Block Collection #1
Video Type: standard CTA Timings
1): ( 4) 1280 × 720p @ 59.94/60Hz - 16:9 - '720p'
2): ( 5) 1920 × 1080i @ 59.94/60Hz - 16:9 - '1080i'
3): ( 16) 1920 × 1080p @ 59.94/60Hz - 16:9 - '1080p'
4): ( 19) 1280 × 720p @ 50Hz - 16:9 - '720p50'
5): ( 20) 1920 × 1080i @ 50Hz - 16:9 - '1080i25'
6): ( 31) 1920 × 1080p @ 50Hz - 16:9 - '1080p50'
7): ( 32) 1920 × 1080p @ 23.98/24Hz - 16:9 - '1080p24'
8): ( 33) 1920 × 1080p @ 25Hz - 16:9 - '1080p25'
9): ( 34) 1920 × 1080p @ 29.97/30Hz - 16:9 - '1080p30'
10): ( 39) 1920 × 1080i(1250 Total) @ 50Hz - 16:9 - '108Oi25'
11): ( 72) 1920 × 1080p @ 23.98Hz/24Hz - 64:27
12): ( 73) 1920 × 1080p @ 25Hz - 64:27
13): ( 74) 1920 × 1080p @ 29.97Hz/30Hz - 64:27
14): ( 75) 1920 × 1080p @ 50Hz - 64:27
15): ( 76) 1920 × 1080p @ 60Hz - 64:27
16): ( 93) 3840 × 2160p @ 24Hz - 16:9
17): ( 94) 3840 × 2160p @ 25Hz - 16:9
18): ( 95) 3840 × 2160p @ 30Hz - 16:9
19): ( 96) 3840 × 2160p @ 50Hz - 16:9
20): ( 97) 3840 × 2160p @ 60Hz - 16:9
21): ( 98) 4096 × 2160p @ 24Hz - 256:135
22): ( 99) 4096 × 2160p @ 25Hz - 256:135
23): (100) 4096 × 2160p @ 30Hz - 256:135
24): (101) 4096 × 2160p @ 50Hz - 256:135
25): (102) 4096 × 2160p @ 60Hz - 256:135
26): (103) 3840 × 2160p @ 24Hz - 64:27
27): (104) 3840 × 2160p @ 25Hz - 64:27
28): (105) 3840 × 2160p @ 30Hz - 64:27
29): (106) 3840 × 2160p @ 50Hz - 64:27
30): (107) 3840 × 2160p @ 60Hz - 64:27

Data Block Collection #2
Extended Data Block: Video Capability Data Block
CE scan behaviour: Always Overscannned
IT scan behaviour: Always Overscannned
PT scan behaviour: Always Overscannned
RGB quantization: Selectable (via AVI Q)
YCbCr quantization: Selectable (via AVI Q)

Data Block Collection #3
Extended Data Block: Colorimetry Data Block
BT2020YCC
BT2020RGB

Data Block Collection #4
Audio Type Block
Supported format: Linear Pulse Code Modulation (LPCM), on 2 channels
Supported freq: 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
Supported samples: 16 bit, 20 bit, 24 bit


Data Block Collection #5
Extended Data Block: YCbCr 4:2:0 capability map data block
VSD Index 18
VSD Index 19

Data Block Collection #6
Vendor specific Data Block - Vendor Identifier: 00:0C:03
Found HDMI IEEE Registration Identifier
CEC physical address........... 1.0.0.0
Supports AI (ACP, ISRC)........ No
Supports 48bpp color depth..... No
Supports 36bpp color depth..... Yes
Supports 30bpp color depth..... Yes
Supports YCbCr 4:4:4........... Yes
Supports dual-link DVI......... No
Maximum TMDS clock............. 600 MHz
HDMI video capabilities........ Yes
Supports 3D.................... No
HDMI 1.4a specifics............ present
HDMI VIC 0................. 3840 × 2160 @ 30Hz
HDMI VIC 1................. 3840 × 2160 @ 25Hz
HDMI VIC 2................. 3840 × 2160 @ 24Hz

Data Block Collection #7
Vendor specific Data Block - Vendor Identifier: C4:5D8
Payload: 01 78 88 01

Data Block Collection #8
Extended Data Block: HDR static metadata data block
Electro optical transfer functions:
Traditional gamma - SDR luminance range
SMPTE ST2084
Supported static metadata descriptors:
Static metadata type 1
Desired content max luminance: 105 (486,099 cd/m^2)
Desired content max frame-average luminance: 105 (486,099 cd/m^2)
Desired content min luminance: 79 (0,467 cd/m^2)

Detailed Timing Blocks - 2 are native
Detailed Timing Block #1 - Timing definition:
Mode = 2560 × 1440 @ 143,856Hz
Pixel Clock............. 586,00 MHz Non-Interlaced

Horizontal Vertical
Active.................. 2560 pixels 1440 lines
Front Porch............. 8 pixels 25 lines
Sync Width.............. 32 pixels 8 lines
Back Porch.............. 40 pixels 70 lines
Blanking................ 80 pixels 103 lines
Total................... 2640 pixels 1543 lines
Scan Rate............... 221,970 kHz 143,856 Hz

Image Size.............. 597 mm 336 mm
Border.................. 0 pixels 0 lines

Sync: Digital separate with
* Positive vertical polarity
* Positive horizontal polarity

Detailed Timing Block #2 - Timing definition:
Mode = 2560 × 1440 @ 59,913Hz
Pixel Clock............. 242,00 MHz Non-Interlaced

Horizontal Vertical
Active.................. 2560 pixels 1440 lines
Front Porch............. 22 pixels 3 lines
Sync Width.............. 44 pixels 5 lines
Back Porch.............. 94 pixels 37 lines
Blanking................ 160 pixels 45 lines
Total................... 2720 pixels 1485 lines
Scan Rate............... 88,971 kHz 59,913 Hz

Image Size.............. 597 mm 336 mm
Border.................. 0 pixels 0 lines

Sync: Digital separate with
* Positive vertical polarity
* Positive horizontal polarity

-----------------------------------------------------
------------ EXTENSION EDID BLOCK 2 ---------------
-----------------------------------------------------

DID-EXT: Display ID Extension:
------------------------------
(only partly interpreted)
DisplayID version........1.1

DisplayID Block Type = Detailed Timing Block type 1:
Detailed Timing #1 in Block
Mode = 5120 × 2880 @ 43,003Hz
Pixel Clock............. 667,31 MHz Non-Interlaced

Horizontal Vertical
Active.................. 5120 pixels 2880 lines
Front Porch............. 48 pixels 3 lines
Sync Width.............. 32 pixels 5 lines
Back Porch.............. 80 pixels 51 lines
Blanking................ 160 pixels 59 lines
Total................... 5280 pixels 2939 lines
Scan Rate............... 126,384 kHz 43,003 Hz

Is non-default Mode
Sync: Digital separate with
* Negative vertical polarity
* Positive horizontal polarity

Detailed Timing #2 in Block
Mode = 5120 × 2880 @ 45,002Hz
Pixel Clock............. 698,81 MHz Non-Interlaced

Horizontal Vertical
Active.................. 5120 pixels 2880 lines
Front Porch............. 48 pixels 3 lines
Sync Width.............. 32 pixels 5 lines
Back Porch.............. 80 pixels 53 lines
Blanking................ 160 pixels 61 lines
Total................... 5280 pixels 2941 lines
Scan Rate............... 132,350 kHz 45,002 Hz

Is non-default Mode
Sync: Digital separate with
* Negative vertical polarity
* Positive horizontal polarity

DisplayID Block Type = ASCII String:
SwitchResX

 

[joevt]

Do you mean this?

Yes. It looks correct.

After a restart 45Hz is not valid. I can't apply it.

Strange. I only see 43 and 45 in your list of custom resolutions. You should be able to create many custom resolutions (all the ones from 30 to 60Hz) at once. Then test all of them at once.

But I was able to get 5K & 37Hz with the AMD Card and the HDMI cable.

Did 31 to 36Hz also work?
37Hz is 572 MHz and therefore allows RGB 4:4:4 8bpc
38Hz is 588 MHz which might be too close to the 600 MHz max of HDMI 2.0 RGB 4:4:4 8bpc.
Did it allow you to create higher resolutions than 38Hz for HDMI 2.0?

Sorry, I really didn't get this part. I never had anhing to do with the Terminal, this is completely new for me.

I created a EDID file with SwitchResX
Its in the Spoiler. Should I delete the red parts?

Yes, you can start with those to see if anything changes. It's possible (probable?) that the graphics drivers won't consider chroma subsampling modes when checking validity of custom resolutions.

You might also want to change the following:

Descriptor #3 - Monitor limits:
Horizontal frequency range.......15-200 kHz
Vertical frequency range.........20-60 Hz
Maximum bandwidth range..........600 MHz

Display type:
-------------
Display is continuous frequency


Is this EDID from the HDMI port? This EDID is modified by SwitchResX to include the two custom resolutions (but doesn't show the 37Hz resolution). Does the EDID appear in AGCDDiagnose output?

The HDMI EDID is very different from the DisplayPort EDID. After playing with the HDMI EDID, you should probably be thinking about modifying the DisplayPort EDID.

 

[joevt]

Im in a German Hackintosh Forum too and there is a guy who has the same Panel and the Same Controller Board.
He achieved 5K with 60hz just using switchResX.

I've read (using google translate) the forum thread at https://www.hackintosh-forum.de/for...g-mit-original-imac-panel-funktioniert-nicht/

His 5K 60Hz resolution has bad gradient caused by chroma subsampling (or RGB, 6 bit per component, 18 bits per pixel, 262144 colors). Output from AGCDDiagnose will show if he is getting HBR2 speed like you are. His controller board might have a different firmware and EDID. AGCDDiagnose will also show that information.

I don't think the cable is the problem. There is very little difference or no difference between a DisplayPort 1.2 cable and a DisplayPort 1.4 cable. The AGCDDiagnose will tell you if it supports DisplayPort 1.4 or not, regardless of the cable used.

HDCP 1.4 Enabled repeater might be something listed in the AGCDDiagnose among the HDCP related parts of the DPCD registers. His firmware might be giving different values.

30bit color depth shown in macOS only represents the color depth of the frame buffer and not the signal that is output to the display.

The iiyama ProLite XB2779QQS-S1 5K display supports 5K 60Hz 8bpc RGB because it supports DisplayPort 1.3 or 1.4.

Your display seems to only support DisplayPort 1.2 which limits you to 5K 30Hz or 5K 60Hz 8bpc YCbCr422 or 6bpc RGB.

Ask that person again to give AGCDDiagnose output.

 

[Arstidir]

Strange. I only see 43 and 45 in your list of custom resolutions. You should be able to create many custom resolutions (all the ones from 30 to 60Hz) at once. Then test all of them at once.

I tested the others too. But im only able to have two valid custom Resolutions in the free Version. The other resolutions between 30 & 60 Hz. are all not valid and I can't apply them.

Did 31 to 36Hz also work?

Yes. 31 -36 also works.

Did it allow you to create higher resolutions than 38Hz for HDMI 2.0?

I can create them, but there not valid and I can't apply them.

Ask that person again to give AGCDDiagnose output.

I found another Problem. I thought I have Backlight & Brightness at 50%, but there both by 100%. The Display is way to dark compared to my Retina MacBook Pro Mid 2012.
Its the same in Windows.

Is there any way to change the Brightness in macOS ?
I tried the nativeDisplaxBrightnessTool and this.

GitHub - nriley/brightness: Command-line display brightness control for macOS.

Command-line display brightness control for macOS. - nriley/brightness

github.com

I wasnt able to control the Brightness.

 

[Arstidir]

Hey @joevt

Thanks for your support and your patience, but I have decided to give up.
Like I wrote in my last reply, the Display is way to dark compared to my MacBook Pro.
Maybe the display is damaged or the Driver board. I don't know.
Apart from that I think its to much effort and consumed to much time to deal with the 60Hz. Problem.
Im sending the Display and the iMac case back while I still can.
I hope I can get a partially refund for the driverBoard.

Tanks again,
Arstidir