Cable Matters 48Gbps USB C to HDMI 2.1 Adapter, 8K@60Hz

Bought this specifically to get 120Hz out of my M1 Pro Macbook Pro as I had moved to a LG C3 42 inch TV as a monitor. Asked to confirm this was the right one (it was) and they sent the instructions for how to apply and update. All done, and it worked straight away with my Sony TV (as a test). However when I got my C3, I could only get 30Hz out of it (using a known good cable that handled 120Hz directly on the PC straight off the bat and would do 60 Hz straight from the Macbook). Contacted Cable Matters and within the day I received a brand new firmware update which worked and I got 120Hz with the LG C3. They even confirmed that it would work with the latest update of Sonoma. Note: You will need a USB-C or Thunderbolt connection which supports DP Alt mode so don't get disheartened if it doesn't work after the update. A great product backed by fantastic customer service from Cable Matters (all responses were within the day). Special shout out to Grace from Cable Matters who was brilliant!

Disclaimer: 4k 120Hz is not supported out of the box, it will require manual tweaking The process of enabling it is straight forward and requires less than 5 minutes of work. You will require a Windows machine with a thunderbolt3/4 port or DP over USBC capabilities. The firmware and instructions are found online after searching: DP/USB-C/Thunderbolt 3/4 to HDMI 2.1 4k@120hz RGB4:4:4 10b HDR with Apple Silicon M1/M2/M3 now possible ! The Cable Matters USB-C to HDMI 2.1 solved all my issues. I've long wanted to embrace the one cable life with my Macbook but always had to compromise. All docks I've come across are limited to 4k 60Hz when connected to Macs just like the HDMI port on the device itself. This adapter was outstanding and singlehandedly resolved my issue. Using the firmware update tools and an older firmware version I was able to utilize the Thunderbolt 4 ports on my dock and display 4K 120Hz HDR to my TV. If you're planning to replicate this, for the smoothest experience ensure the adapter is the 201388-A model and you're using a certified HDMI 2.1 cable. The build quality on the adapter is great. The aluminium shell dissipates the heat from the chip inside the adapter and allows it to run significantly cooler than other products I tried. I was so happy with this adapter that I ordered another one straight away. I recommend this adapter to everyone.

I tried plugging this in to my ThinkPad with i7-1165G7 CPU and only got 4K60Hz at first. Cable Matters has a firmware update tool, but my ThinkPad couldn't read the IC of the adapter's chip for some reason. After trying it on my Asus 14X i5-11357 (which also defaulted to 4K60Hz), I was able to get the Asus to read the IC of the adapter and flash the update successfully. After also updating the Intel Xe Graphics drivers on both machines, I was able to get 4K 120Hz HDR to output from both machines (albeit at 10-bit 4:4:4 on the Asus 14X and only 8-bit 4:2:0 on the ThinkPad) Regardless, it's the first (and only) such adapter I've found that can accomplish this feat, and I'm very happy with paying the slight premium for something that works perfectly (after some growing pains). Would strongly recommend - with caveats noted (you must be somewhat comfortable with tech upgrades/flashing firmware)

EDIT: After some tech support was able to point me in the direction of a firmware update, I was able to get the device working at the desired resolution and refresh rate. The device had problems with Intel Gen 11 and an update to the firmware resolved the issue. However, if you try to find the device with the model number (201388) on their website, you will not be able to find it. Instead, you will have to look in the 'Knowledge Base' portion of their website and find the VMM6100 firmware update. This relates to the chipset. If you google, 'Cable Matters 201388 Chipset', you'll see VMM7100 chipset, which is incorrect. This is an utter mess! But was at least able to resolve the issue in the end! OLD REVIEW: *Could never get anymore than 1080p out of this* Only getting 1080p@60hz with this converter. I have the correct HDMI cable (works @ 8k60) and Thunderbolt 4 connection. In the end I had to buy another cable, USB-C to DisplayPort and now I am getting my desired resolution (2k@165hz).

Reviewing this based on it's 4K 120Hz ability so anything else isn't relevant. Bought this as it's pretty much the only game in town (Fully Certified 2.1 compliant) so far from what I can see available TBH. I wanted to Tap my gaming laptop's USB C port & feed it into my big TV as I wanted to check out the TV's gaming abilities at that 4K 120Hz spec. I ordered this & upon prompt arrival I connected everything up & that was that, job done really. Laptop has a 3070 card + a 48Gbit USB C out port & the Sony TV had x2 HDMI 2.1 certified ports. This little device worked 1st thing & it does exactly what it claims & allows me to game at 4K 120Hz on the big screen instead of always gaming on the far smaller laptop display. It hasn't faltered once. It appears solidly built & it's In + out plugs/ ports are nice & robust too. It's even quite pleasing to the eyes for such a device & has no horrible plastic'y parts. I honestly can't think of anything even slightly negative to say about the thing. So for 30 Quid it's well worth the outlay if you're like me & looking to get 4k 120Hz without an HDMI 2.1 output port. To sum things up then = Well worth the money, built well & does exactly as it claimed :) I can Highly Recommend this little device :)

It’s one of the very few devices that can do 4K, 120hz HDR. Works great connecting my gaming laptop Lenovo legion slim 7 (which has no HDMI), UBSC to HDMI to my LG OLED 4K, HDR TV. I’ve had it for a year no issues. Fantastic.

The maximum resolution that I could get from this was 1080 at 60 hz. Apparently it isn't compatible with 11th generation intel chips so you have to use the VMM DP Tool to fix this. I tried to install this tool but kept getting an error so I had to return it.

This is a quality product, does exactly what it says on the tin, and then some. Being able to update the firmware on it, and to enable 4k120hz output from my M1 MacBook Air has been revolutionary. I got in contact to ask the seller whether it would be the 201388-A model or the 201388 model, and they came back confirming the 201388-A model in no time at all. The product itself feels very well made, solid and robust. It does have an annoying blue light that is on when in use, but that can easily be covered up. It also doesn't get hot at all, unlike some other adapters I've tried. Can't recommend this adapter enough.

AMAZING! has been working flawlessly since I got it. Love this thing.

Cumple con la función de pasar señal 4K 120hz hasta 12 bit color Full Gamma. Pero se pierde compatibilidad con VRR (Gsync / Freesync) Si tienes una RTX 20XX y no quieres estar limitado al HDMI 2.0 este adaptador es la opción, pero considera que no es compatible con VRR.

スマホ画面を他の人と共有できるのでとても便利です。

Does the job! Finally! Both my monitors work now.

I have a Dell laptop that is hooked up to a Samsung S95F by a Silkland Ultra A certified HDMI "Ultra High Speed" cable. I was unable to get the highest resolution and refresh rate out of the TV and laptop. I researched and determined that I needed to use the USB-C lighting connection on the PC to achieve this. I purchased this adapter, plugged it into the laptop, plugged the same HDMI cable into the adapter and it worked with no issues. I adjusted various settings and could get 3840x2160 at 120HZ. That is the highest setting and rate the laptop / tv combo is capable of (at 120). The connection was easy, plug and play, No extra or external power required, the size of the adapter really didn't change anything on my setup (location of laptop and cables connected to the tv). As far as sound quality goes I could discern no difference between the before and after, still sounds great. I am using this setup to watch streaming 4K movies and OTA TV. The tv is setup as a dumb tv and just a monitor. Last thoughts. There are so many factors that will stop you from achieving the highest rates possible. The big three needed to achieve this are, 1. Is your GPU and PC hardware actually capable of providing the desired rates. 2. Is the display that you are using actually capable of the desired rates. 3. And this is the big one. Are the cables and connectivity actually rated for you tp properly connect # one and two above. It took me several days to source the correct hardware and this device was the correct hardware in my circumstance.