CalDigit USB-C to HDMI 2.1 8K Adapter Dongle - High Refresh Display, HDR, 10 bit, Compatible with Thunderbolt 3, 4, 5 / USB 3.1, USB4 for, 2016+ Apple MacBook Pro & Air (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.

The CalDigit USB-C to HDMI adapter does not skimp on build quality or resolution options, like some of the cheap options out there. Compatibility with Apple products is the best I've found. It does not get hot, connects fast every time and is one of the few that will power on my external 4K TV over HDMI when I connect my MBP to my CalDigit TS5 dock. I've got a handful of the cheap adapters too but there are always issues running two or three displays that prevent you from using the resolution and refresh rate you want. If you want the best USB-C to HDMI, stick with CalDigit.

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.

I tried using this adapter on my M1 Max Mac Studio and ASUS ProArt 6K PA32QCV display. There was no difference between plugging the HDMI cable directly to my Mac and using it with the adapter - in both cases the max screen resolution was capped at 4k. This adapter was not able to successfully convert the Thunderbolt 4 signal to HDMI 2.1 to support 6k resolution.

Great adapter - highly recommend!

Very expensive but seems like the build quality is excellent

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.

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.

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

【 注文のきっかけ 】 新型のMacBook Pro M4 Maxを導入し、デスク環境を8Kモニターで構築しようと考えたのがきっかけです。本体のHDMIポートを使わずに、Thunderboltポートから高リフレッシュレートかつ高解像度で出力できる信頼性の高いアダプタを探しており、信頼のCalDigit製を注文しました。 【 良かった点 】 ■ 圧倒的な描画スペック HDMI 2.1規格にしっかり対応しており、8K出力はもちろん、高リフレッシュレートでのヌルヌルとした動きを体感できます。HDRや10ビットカラーの階調も非常に美しく、クリエイティブワークにおいて妥協のない映像環境が手に入りました。 ■ 安定の接続維持 安価な変換アダプタにありがちな、スリープ復帰時の暗転やチラつきが一切ありません。M4 Maxのパワーをロスなくモニターに伝えている実感が持てます。 ■ 洗練されたビルドクオリティ CalDigitらしい堅牢な作りで、放熱性も考慮されている印象です。長時間高負荷な映像出力を行っても、動作が不安定になることはありませんでした。 【 気になった点 】 ■ ケーブル自体の硬さ 断線防止のためか、ケーブル部分がやや太く硬めです。取り回しに少し慣れが必要ですが、その分耐久性は高そうなので、据え置きでの使用であれば問題ありません。 【 総評 】 ハイエンドなMacBook Proユーザーや、最新のゲーミングモニター・8Kテレビを活用したいプロフェッショナルな方に最適です。 安物を買って相性問題に悩むくらいなら、最初からこれを注文しておくのが正解だと断言できます。最高のスペックをフル活用したいなら、必携のアイテムです。

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