CalDigit USB-C to HDMI 2.1 8K Adapter Dongle - High Refresh Display, HDR, 10 bit, Compatible with Thunderbolt 3/4 / USB 3.1 / USB4 for Apple MacBook Air, 2016+ MacBook Pro (USB-C to HDMI 2.1 (8K))

I had been using an Anker HDMI 4k USB-C connector with my Mac Studio for a year or so and it was getting really hot and the screen would lose connection for a few seconds at a time. I figured it needed replacing and saw the Cal-Digit (I've used their Thunderbolt hubs in the past) option with 8K support. I don't have an 8K monitor but figured I *might* someday..! Works great, screen actually looks clearer to me, so perhaps the Anker 4K was forcing me into a lower refresh rate than I had expected and never noticed. Either way, it works perfect to run at 4K/60 on my Dell monitor, and is not getting as hot as the Anker was. Solid option, much higher quality than the $10 random company adapters, and on-part with (if not better) than the Anker option.

Works for 4k 240hz HDR on Asus PA32UCDM

I have tons of displayport adaptors and this is the only one that is able to reliably send a signal. Now you are probably here looking to see if it can do 4k 120hz HDR and I will let you know right off it will do so with ease. In addition I found these to be a god send for enterprise laptops that are so touchy about what they want to work with. I tried a dozen adaptors from well known brands with far less stringent needs (4k 60hz no HDR) and they would all fail where this adaptor while over spec'ed for the task has been rock solid.The one thing of note is that I have not been able to get VRR or Gsync to connect with this. The documentation on the viability of this is questionable but I did want to note that I have not been able to get that functioning.Overall this is an amazing adaptor and well worth the cost.

It worked great for 15 months. Then it started to flicker and simply stopped working. It's a shame!

I’ve spent dozens, maybe over a hundred hours troubleshooting why my Samsung Super Ultrawide G9 wouldn’t get a signal over HDMI when my secondary monitor was plugged into the DP port on my RTX 5080. The only way to get the G9 working was to unplug the second monitor before powering on—super frustrating, especially for a premium setup.Using a regular DisplayPort cable was a last resort for me. The HDMI 2.1 port on the G9 is simply faster, and it’s the only way I was able to achieve 12-bit color—so giving that up wasn’t an option.Turns out, the culprit was a Windows 24H2 issue, and after tons of searching, I found no real solution… until I came across this $30 adapter.I plugged it into the DP 2.0 slot on my GPU, and that was it—problem solved. Not only does the G9 now get a signal with both monitors plugged in, but I’m still getting 12-bit color, 1000 nits of brightness, VRR, 240hz and—finally!—the BIOS splash screen shows up on my primary monitor like it should.This little adapter saved me hours of headaches. If you're running into the same issue, this is 100% worth it.

Very expensive but seems like the build quality is excellent

I'm one of the (un)lucky ones with a modern AMD video card and a TV that only supports HDMI. The TV is a 4k/120 TV with variable refresh rate (VRR), which works great in Windows... and not so much in Linux thanks to the HDMI Forum's decision to not allow HDMI 2.1 support in open source drivers and firmware.Reading online, it appeared as though this adapter might work for me, but when I contacted CalDigit through their subreddit, they weren't sure if it would work or not. Unfortunately, VRR didn't work. To be fair, they don't claim it should work - hence why no stars are marked off for this, and they went above and beyond with their support. Still, if you don't need VRR, this worked like a charm for me - full 10-bit video 4k/120 Hz.

Look no further, this is the one. Ran a 30 foot fiber optic hdmi cable from my pc to my tv using this adapter. Finally found the adapter the adapter that lets me run everything on the highest setting with HDR and VRR enabled. BUY IT!