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 have a pile of DP to HDMI adapters I've tried. This CalDigit one is the ONLY one I've found to work reliably and I have four of them plugged in, currently. Even the CableMatters adapter doesn't work as well as this one. If you are still having issues with this adapter, it is probably your cable. Before you blame the adapter, combine it with a RUIPRO Fiber Optic HDMI cable. Yes, even down to 6ft or even 3ft in length.

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.

Works amazing no flicker great quality. Will definitely order more.

Was not able to get it working above 4k@60 on either Windows 11 or Fedora KDE Linux. I have a Radeon RX6800xt graphics card and a Samsung Qn900D Tv. The TV just turns green using windows 11 when the TV "Input Signal Plus" is turned on and the resolution and refresh rate are limited when it is turned off. Fedora KDE desktop did not recognize high refresh rate or 8k resolution either. Tried multiple ports and hdmi cables including a 2ft ultra high bandwidth certified cable.

Not sure why this thing works so much better than what I was using, but it does. M2 MBP connected to 42" LG C5 through an Anker Prime TB5 docking station. The native port on the dock was ok, but adding this made a huge difference. Full 4k 120hz with readable text that doesn't strain my eyes. The colors finally look right. I am using the free version of BetterDisplay, but not sure that matters. Definitely worth the 30 bucks. I've been trying to get this to work well for a few weeks.

Pros: - Supports my monitor's resolution of 3340x1440 over HDMI even with > 100 Hz - Works using my Belkin Thunderbolt Dock's DisplayPort out and monitor's HDMI in Cons: - Audio over the HDMI is choppy and cuts in and out. I verified that using a straight display port from the dock does not have this issue and also a straight HDMI from the source does not have the issue either. Takeaway: This works great as long as you aren't concerned about audio! It's possible that maybe the bandwidth required to process the video at a high resolution and refresh rate PLUS the audio signal is too much? Not sure.

A bit of a godsend for me, given my rather embarrassing situation. Spent a good deal of time unplugging and plugging in my graphics card, doing upgrades to my PC. Last instance of plugging in the HDMI cord, boom, bent the HDMI receivers. Did some research and found that I could use a Display Port to HDMI adapter to regain use of the graphics card. Ran into the problem of not quite finding a suitable adapter for what I wanted resolution and refresh rate wise. Then comes along this product. Works instantly, no oddities as of yet. More than able to maintain my current 4k, 120 hertz setup, and play my modern games. The adapter does get somewhat warm, but certainly not hot. Good price for the product, given the value of being able to use it rather than taking my graphics card to a professional for a risky repair to a modern graphics card. I will update this review if anything becomes amiss or is substantial enough to inform others about. For reference, my graphics card is an MSI Radeon 7900xtx (one HDMI 2.1, three DP 2.1).

Works perfectly. Verified no flickering for 120Hz on resolution up to 4096x2160.