- 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.

Always best caldigit brands

I doesn't get the maximum out of my display, even though I use it with CalDigit Element 5 TB5 hub with my M4 MBP (2024). Despite my MBP having only TB5, there should be enough bandwidth for 4k / 144 Hz, but it only shows 60 Hz. What a waste of money! The reason I can't return it is because I'm now on the other side of the world.

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.

Very expensive but seems like the build quality is excellent

I have tried about six of these adapters and every one has had some missing or quirky functionality except for this one. Some of them will cut the borders of the screen off, some of them only work for 60 hz, some of them don't work with HDR and some only work when my tablet is plugged in, it has been a nightmare. Finally with this one I get full 4K 120 hz and HDR and it doesn't cut the screen edges off. If you are like me and have been searching for an adapter that actually does everything it claims to do then this is the one to get.

Works perfect to connect my M2 Max MacBook Pro to my TS3Plus for external monitor use.

Tried it on the 14” M1 Pro and Mac Mini M2 Pro and was only able to get 4K 60hz. It’s my fault for not reading the fine print but I wish Caldigit just put in big fonts does not do 4K 120hz with Apple Silicon.

This adaptor is not able to display 4k at higher refresh rates than 60hz when using HDR on a MacBook Air M3.

TS4に使用しています。映像関係のケーブル類は安物を使うと予期せぬトラブルが起きることがあるので、お値段高めですが信頼できるこちらの商品を選びました。今のところ問題なく安定して使えています。個人的に価格は気になりませんが、HDMI端子が大きいところが少し気になります。写真左側が同社のHDMI2.0までのアダプター、写真右側が本製品です。全長はどちらも同じ、HDMI端子部は本製品の方が長いですが、幅と高さは若干ですが本製品の方が短い・低いです。

This converter is more expensive than others, but entirely worth it if used on a daily basis, like most CalDigit products (I also own a TS3). I use it on a Mac M1 and it reaches 85 Hz on an AW3821 WQHD+ (3840 x 1600).

The CalDigit USB-C to HDMI 2.1 8K Video Adapter let me down. Even though it has great reviews I have found it to be of inferior performance compared to offerings from other manufacturers, making it hard to justify the price premium paid for this product. On top of this, it's worth noting that the adapter lacks DolbyVision support. If you're planning to connect it to an iPad or device capable of outputting DolbyVision I would avoid this adapter (see pic attached). For SDR / HDR10 output it will work fine but it's overall performance is still worse compared to other adapters. The adapter I went for in the end is (https://amzn.eu/d/jm5iyYy), I hope this saves you the hassle of trying different products and dealing with returns. The build quality of the adapter is great and in line with other CalDigit products, ease of use also receives a 5-star but they won't make up for the other drawbacks.

I was forced to buy a few different brands one after another, because they all seem to make claims that are not entirely true. In this adapter's case, it cannot achieve HDMI 2.1 spec to the word. When attempting 4K 120Hz HDR with LPCM audio, the adapter can only go up to 4:2:0 compressed format, which means 'fuzzy' colours as it is an old way of transmitting compressed lossy video image data to a screen, pure uncompressed RGB requires higher bandwidth, which is what the HDMI 2.1 spec allows for! This adapter is incapable of RGB 10bit @ 120hz in 4K, as such it should not be labeled 'HDMI 2.1' adapter. Those who are after a Thunderbolt 3/USB4 compatible 8K adapter, to help you avoid having to make returns (I'm doing you a favour here by saving you on headaches), in the end the one that worked without issue was https://www.amazon.co.uk/dp/B0B57T77H3