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Does this 4k@120hz tweak work for you?

  • Yes

    Votes: 186 82.7%
  • No

    Votes: 18 8.0%
  • Can not get the right Adapter

    Votes: 19 8.4%
  • Yes, but Apple limit HDR/HiDPI functionality with macOS 14.1 and macOS 15

    Votes: 2 0.9%

  • Total voters
    225

lixuelai

macrumors 6502a
Oct 29, 2008
965
337
This is really great even without the need for HDMI 2.1. Flashed firmware onto a Moshou adapter with VM7100. Solves all the problems I have with my LG 38 Ultrawide.
 

Ruckus3285

macrumors newbie
Jun 21, 2024
2
0
So I've flashed a couple of VMM7100 based adapters and got them working on my Macbook Pro M1 13" and my wife's Macbook Pro M2 16".

But on my Macbook Air M1, it still lists 60hz as max.

So it's likely something with the Mac's software but don't even know where to start debugging this.
 

Ruckus3285

macrumors newbie
Jun 21, 2024
2
0
So I've flashed a couple of VMM7100 based adapters and got them working on my Macbook Pro M1 13" and my wife's Macbook Pro M2 16".

But on my Macbook Air M1, it still lists 60hz as max.

So it's likely something with the Mac's software but don't even know where to start debugging this.
OK. not sure why. but updating from Monterey to Ventura allowed the use of 120hz.
 

hydw

macrumors newbie
Jun 23, 2024
5
1
Does the firmware update/patch work on any vmm7100 adapter? Also, has anyone gotten a M1 MBA Sonoma 14.5 to output 4k120? I'm using a LG C3 42".
 

komuh

macrumors regular
May 13, 2023
126
113
Does the firmware update/patch work on any vmm7100 adapter? Also, has anyone gotten a M1 MBA Sonoma 14.5 to output 4k120? I'm using a LG C3 42".
Mine was working fine without any firmware upgrade (I'm using betterdisplay and input for TV HDMI is set to PC for both M1 ultra and M1 air)

<Can even run HDR at native 120hz 4k>
 

hydw

macrumors newbie
Jun 23, 2024
5
1
Mine was working fine without any firmware upgrade (I'm using betterdisplay and input for TV HDMI is set to PC for both M1 ultra and M1 air)

<Can even run HDR at native 120hz 4k>
Are you using the Cable Matters VMM7100 adapter or is it a different brand? Are also able to run HDR 4k 120hz with the M1 Air?
 
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KerimEren

macrumors newbie
Apr 12, 2023
5
2
Hi everyone!

Thanks to you all, I also succeeded in getting 4K 120hz 10bit. I have M1 Max Macbook Pro and I've been using cable matters foldable usb-c to hdmi 2.1 adapter(probably 6100) with my LG C2 42''. I can turn on the HDR on display settings without an issue as well, but stay in SDR mode most of the time.

This is the adapter:

Anyway, my question is about updating the Mac OS. I am currently using 13.6 Ventura and thinking of updating the system nowadays. Did anyone experience any issues related to display settings that we kind of "built" for these oled tvs and macbooks after a Mac OS update?

FYI, I did update my TV software each time and it's up to date at the moment.

Thanks!
 

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devrimer

macrumors newbie
Jun 13, 2023
9
1
guys hello, I am very sick and tired of this.
Can someone help me solve my problem.

I have macbookpro retina with touchbar 2018 and benq ex3210u and cable matter adaptor 201388-A and 201310.
I am trying to get 4k 120Hz. but it is not working. should make special settings or etc.

I also buy better display pro app.

I can also buy this usb-c to DP adaptor Link if someone tell it might be work.

please help, help and help...
 

komuh

macrumors regular
May 13, 2023
126
113
Are you using the Cable Matters VMM7100 adapter or is it a different brand? Are also able to run HDR 4k 120hz with the M1 Air?
yup cabble matters adapter (not sure about hdr on m1 air didn't check it but it works fine on ultra so should also work on air considering 120hz 4k works fine)
 

hydw

macrumors newbie
Jun 23, 2024
5
1
yup cabble matters adapter (not sure about hdr on m1 air didn't check it but it works fine on ultra so should also work on air considering 120hz 4k works fine)
Alrighty cool. Just made the purchase for the Cable Matters on Amazon, fingers cross. I hope it works in conjunction with a Caldigit Element too.
 

scoops33

macrumors newbie
Jun 14, 2024
2
1
Just got an LG C3 and managed to get the Cable Matters 201310-BLK multiport adapter to output 4k120Hz 4:4:4, thanks to all the hard work here on this thread!

I wanted HDR along with HiDPI, and @ 120Hz both are exclusive to each other. I decided to drop down to 100Hz (simply cannot go back to 60Hz anymore), and to my surprise at 100Hz refresh rate you can run HiDPI and HDR! Sticking with this now as for productivity 120Hz vs 100Hz is not really noticeable to my eyes.

IMG_2170.HEIC_compressed.JPEG


IMG_2171.HEIC_compressed.JPEG
 
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Comzee

macrumors newbie
Jun 25, 2024
1
0
YouTube + Medium tutorial both said, if you have VMM6100, just buy another adapter to get the VMM7100.
They made it seem very hard to do this with the VMM6100, it was not hard, at all.

The additional EDID step was pretty trivial. My MBPm1 now effortlessly displays 4k 120hz to my LG OLED TV.
I don't even have to use the better display app, just works from normal settings menu.

Whoever figured this out, greatly appreciated!
 

jck1634

macrumors 6502
Mar 16, 2009
312
139
Just got an LG C3 and managed to get the Cable Matters 201310-BLK multiport adapter to output 4k120Hz 4:4:4, thanks to all the hard work here on this thread!

I wanted HDR along with HiDPI, and @ 120Hz both are exclusive to each other. I decided to drop down to 100Hz (simply cannot go back to 60Hz anymore), and to my surprise at 100Hz refresh rate you can run HiDPI and HDR! Sticking with this now as for productivity 120Hz vs 100Hz is not really noticeable to my eyes.

View attachment 2391918

View attachment 2391919
I just checked this on mine and what I've got is HDR, 120hz and HiDPI are available together if you change your resolution to below what you have in that image. I'm currently on the default because I'm on a LG 42 OLED c3 but I can go as high as 2304x1296 and still have all three. if the screen real estate isn't too much of a priority for you, drop down to that and you can enjoy 120hz too. (not much of a difference I know, but its there if you need it)
 
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scoops33

macrumors newbie
Jun 14, 2024
2
1
I just checked this on mine and what I've got is HDR, 120hz and HiDPI are available together if you change your resolution to below what you have in that image. I'm currently on the default because I'm on a LG 42 OLED c3 but I can go as high as 2304x1296 and still have all three. if the screen real estate isn't too much of a priority for you, drop down to that and you can enjoy 120hz too. (not much of a difference I know, but its there if you need it)
Hey thanks for that! It works and I'm preferring this option now for day-to-day, HiDPI is a must for me as I find I'm getting quite a bit of eyestrain at native. Appreciate the testing.
 

dreikelvin

macrumors member
Jun 22, 2022
54
8
Hi guys, I've been using the Cablematters adapter for a few months now (SKU 201388-A) and I flashed it via the Windows tool as described. It works fine most of the time! But when I leave my mac Studio on standby for a while or even when I boot it up, my connected Samsung TV says the HDMI device is not responding or there is no powered device detected. My TV is a Samsung Neo QLED 4K 50QN93A (2021) which I use as a 4K PC monitor.

To revive the screen, I always have to do one of these two options:

1. Connect via Screensharing from another device and launch BetterDisplay, redetect screens
2. Unplug and Plug Cablematters Adapter back in

I am using the latest firmware linked in this thread. Is this something with my TV or the cable I'm using? (8K HDMI cable, brand new)

Cheers!
 

hydw

macrumors newbie
Jun 23, 2024
5
1
Received the Cable Matters today with the 7100. Did the flash via parallels and everything worked out perfectly! 120Hz in both SDR and HDR. RGB 10b 4L10 in both settings. I'm on a M1 MBA, LG C3, Sonoma 14.5

IMG_3920.jpeg
IMG_3921.jpeg
 
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adnanj91

macrumors newbie
Aug 11, 2022
3
0
This was working flawlessly until I upgraded to macOS Sequoia Developer Beta. The display went from RGB 10b to YCBCR444 8b. Is there a fix for this?

1719859756561.png
 

Nyehehee

macrumors newbie
Jun 7, 2024
3
0
Hi everyone!

I managed to get HDR working at 120 Hz with perfect picture quality using a new gold-plated C-HDMI cable.
My M3 (Sequoia Beta) MacBook Air is connected to an LG C4 TV.
The issue is that when I check the TV's picture info, it only shows BT2020, but as far as I know, BT2100 is required for the full experience.
I searched for this setting in the EDID file but couldn't find it anywhere. Unfortunately, within GeForce Now, the games only display a black screen even though the sound works and the game is running. I suspect the problem lies with the BT setting. Could you help me achieve BT2100?

Another question: has anyone managed to get VRR working with a similar configuration? If so, please share how.

Thank you!
 

thewanted

macrumors member
May 30, 2010
35
3
Does anyone else find that the image is slightly blurry when using the Anker 518 USB-C to HDMI adapter?

As soon as I plug the HDMI cable directly into the MacBook Pro, it looks considerably better.
 

dogbert_

macrumors newbie
Jul 9, 2024
5
0
To try and expand this out to help others.

Heres the original firmware for the ugreen 8K@60hz, 4K@240hz adapter.

I tried flashing the cable matters vmm7100 firmware. The DP stream is enabled but it can't seem to figure out the correct resolution to display at.

When looking at I/O timings in the VMM tool I can see it switching from 200x60000 to 6000x4000.

With the cable matters vmm7100 firmware, the Mac does detect the monitor, and can see the correct resolutions up to 4K@144hz 10bit just nothing displays on the monitor even when forcing an EDID with v1.4 + DP

If this firmware can be modified in the same way the cablematters firmware was, that would be great.

Images from VMMHID when the cable is loaded with the original firmware.

Screenshot 2024-07-10 at 3.12.09 PM.png
Screenshot 2024-07-10 at 3.12.26 PM.png


For note, it's specfically this cable: https://www.amazon.com.au/UGREEN-Adapter-Thunderbolt-Aluminum-Compatible/dp/B0BXWBSJ77
 

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Last edited:

Jack245

macrumors newbie
Oct 5, 2023
7
2
To try and expand this out to help others.

Heres the original firmware for the ugreen 8K@60hz, 4K@240hz adapter.

I tried flashing the cable matters vmm7100 firmware. The DP stream is enabled but it can't seem to figure out the correct resolution to display at.

When looking at I/O timings in the VMM tool I can see it switching from 200x60000 to 6000x4000.

With the cable matters vmm7100 firmware, the Mac does detect the monitor, and can see the correct resolutions up to 4K@144hz 10bit just nothing displays on the monitor even when forcing an EDID with v1.4 + DP

If this firmware can be modified in the same way the cablematters firmware was, that would be great.

Images from VMMHID when the cable is loaded with the original firmware.

View attachment 2395842 View attachment 2395843

For note, it's specfically this cable: https://www.amazon.com.au/UGREEN-Adapter-Thunderbolt-Aluminum-Compatible/dp/B0BXWBSJ77
I have the exact same issue with this cable. The timing problem on flashed firmware seems to occur only with 4k 60Hz and 4k 120Hz. If you try to set it to 2k 120Hz 8-bit, it'll work fine, but not in 4k 60Hz 8-bit, which requires the same amount of bandwidth. The original firmware works up to 4k 60Hz 10-bit, but with custom firmware, you are limited to 4k 30Hz 8-bit or 2k 120Hz 8-bit, which is kind of odd. Also, the file size for the Ugreen firmware is about 3 times smaller than that of Cable Matters: 320KB vs. 1024KB
 
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