Is this adapter bidirectional?

No. It only coverts video from USB-C with DP Alt Mode or Thunderbolt 3/4/5 ports (host) to HDMI displays. It does not support HDMI sources like PS5 or Xbox to USB-C devices.

Does this adapter work with macOS?

Yes, but macOS systems are limited to 4K@60Hz output over USB-C/Thunderbolt, regardless of the display’s capabilities.

Why do I experience flickering or no signal?

Use a short certified HDMI 2.1 cable and confirm HDMI 2.1 mode is enabled on your display. Try lowering resolution or refresh rate. Search “Cable Matters 48Gbps Adapter Troubleshooting” for further instructions.

Why am I not getting 8K or 4K 240Hz?

It require a GPU that supports 8K or 4K240Hz over USB-C (RTX 20/30/40, RX 6000/7000, Intel 11th/12th Gen or newer), an HDMI 2.1 display, and a certified HDMI 2.1 cable. Enable HDMI 2.1 mode on your display and drivers are up to date.

Why do I get only 4K@120Hz with Intel GPUs and Acer monitors?

This is a known compatibility limitation with Intel GPU and Acer monitor setup when using this product. With AMD or NVIDIA GPUs, the same monitor can reach 4K@144Hz or higher.

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8K USB Type C HDMI 変換アダプタ

Product ID: 726246520

Details

Brand
Cable Matters
Color
gray
Compatible Devices
Gaming Console
Connector Type
DisplayPort 3
Specific Uses For Product
TV PC Monitor

⚡48Gbps ultra-high bandwidth

🎮ALLM low latency for gaming

🖥️8K@60Hz & 4K@240Hz resolution support

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$50.32

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Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Elevate your display game with 48Gbps power and 8K clarity — don’t get left behind!

BUILT TO LAST - Durable cable and premium connectors designed for long-term reliability and professional use.
NEXT LEVEL VISUALS - Supports 8K@60Hz and ultra-smooth 4K@240Hz output with Dolby Vision and HDR10 for stunning clarity.
LAG FREE GAMING STREAMING - Auto Low Latency Mode (ALLM) ensures ultra-responsive gameplay and video playback.
BLAZING FAST 48 GBPS TRANSFER - Experience seamless 8K and 4K HDR streaming with the latest HDMI 2.1 standard.
UNIVERSAL THUNDERBOLT USB C COMPATIBILITY - Works flawlessly with Thunderbolt 3/4/5, USB4, and USB-C devices including Intel Evo and top-tier GPUs.

The Cable Matters USB C to HDMI 2.1 adapter delivers cutting-edge 48Gbps bandwidth supporting ultra-high resolutions up to 8K at 60Hz and 4K at 240Hz. Compatible with Thunderbolt 3/4/5 and USB4 devices, it features HDR10, Dolby Vision, and Auto Low Latency Mode for immersive visuals and lag-free gaming. Designed for professionals and creators, this adapter combines durability with broad device compatibility, making it the ultimate choice for next-gen video output.

Specifications

ASIN	B08MSWMXT4
Amazon Bestseller	#37,825 in Computers ( See Top 100 in Computers ) #89 in DVI-HDMI Adapters
Brand	Cable Matters
Color	gray
Compatible Devices	Gaming Console
Connector Type	DisplayPort, HDMI, Thunderbolt 3, Thunderbolt 4, USB Type C
Customer Reviews	4.4 4.4 out of 5 stars (816)
Finish	Matte
Item Weight	0.02 Kilograms
Manufacturer	Cable Matters
Mfr Part Number	201388-GRY
Model Number	201388
Number of Ports	1
Package Quantity	1
Power Plug Type	No Plug
Specific Uses For Product	TV, PC, Monitor, Laptop
UPC	818707029640
Unit Count	1.0 Count
Warranty Type	Limited

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