CalDigit USB-C to HDMI 2.1 Female High-Resolution Display Adapter Dongle

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

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

4k60hzのモニターとPC間の接続で、C to HDMIの4k60hz対応を使用していましたが、映像が安定せず、こちらの製品に切り替えたところ、全く不調なくなりました。 体感ですが、他の変換機より発熱も抑えられていると感じます。

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).

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.

I previously tried a USB-C to HDMI cable, and it didn't work reliably on my KVM, to the point where when I switched back I would get no signal. When I did get signal I would get an extra "blank flash" after it stabilized. I got this adapter instead and paired it with Club3D certified cable and it worked instantly with no issues! No "blank flash", instantly switches back, and it always has signal. And I'm using a good KVM too from Level1Tech. Wendle has put in a ton of effort in making KVM's that are not terrible, working with the manufacturer, writing, testing, and dogfooding his own firmware, ensuring it works with G-Sync/FreeSync/VRR. I chose this adapter over another one because I wasn't sure what chipset other adapter had, similar to the cable. CalDigit makes really good docks and focuses on Mac, so I figured a higher level of testing would go into this adapter. So far it seems like it has! This works on my older M1 MacBook Pro and my newer M5 MacBook Pro. Even better for my M1 because the HDMI port is older and only supports 60 Hz unlike the M5, and over USB-C I can get a full 240Hz.