Is this adapter bidirectional? / Can I use it with my host’s HDMI output and my monitor’s USB-C input?

No. This adapter is a unidirectional USB-C to HDMI adapter. It only converts 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 the PS5 or Xbox to USB-C devices.

Does this adapter work with macOS? / Does it support 4K@120Hz, 4K@240Hz, or 8K on my Mac?

This adapter can work with macOS host but is limited to 4K@60Hz on macOS. For 4K@120Hz or 4K@240Hz on Mac models, use the firmware-enhanced macOS version, ASIN B0DCN798Y1 / Model 201488.

How can I achieve 8K@60Hz, 4K@120Hz, or 4K@240Hz with this adapter?

Actual output depends on the host USB-C/Thunderbolt port, GPU, drivers, HDMI 2.1 display, and certified HDMI 2.1 cable. Some TVs may require firmware updates or Enhanced/High-Refresh HDMI mode.

Why is there no video output, flickering, or no signal?

Confirm the USB-C port supports DP Alt Mode, USB4, or Thunderbolt. Use a certified HDMI 2.1 cable, select the correct HDMI input, enable Enhanced/High-Refresh mode if needed, update GPU drivers, and lower the resolution/refresh rate.

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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Cable Matters 48Gbps USB C to HDMI 2.1 Adapter Supporting 4K 120Hz and 8K HDR - Thunderbolt 3 and Thunderbolt 4 Port Compatible - Maximum Resolution on Mac is 4K@60Hz

Product ID: 342172961

Details

Brand
Cable Matters
Colour
Gray
Compatible devices
Laptop
Connector type
HDMI USB
Specific uses for product
TV PC Monitor

⚡48Gbps ultra-high bandwidth

🔗Thunderbolt 3/4/5 & USB-C compatible

🖥️8K@60Hz & 4K@240Hz max resolution

Description

🚀 Elevate your display game with the ultimate USB-C to HDMI 2.1 adapter!

OPTIMIZED FOR MAC PC - Supports 4K@60Hz on macOS and up to 8K@60Hz on Windows with compatible hardware.
PREMIUM DURABILITY DESIGN - Braided cable and aluminum housing ensure longevity and a sleek, professional look.
BLAZING FAST 48 GBPS TRANSFER - Experience seamless 8K HDR and 4K 120Hz visuals without lag or compression.
NEXT GEN HDMI 2 1 POWERHOUSE - Unlock ultra-high resolutions and refresh rates for gaming, streaming, and professional use.
UNIVERSAL THUNDERBOLT COMPATIBILITY - Works flawlessly with Thunderbolt 3, 4, and 5 ports for future-proof connectivity.

The Cable Matters USB-C to HDMI 2.1 adapter delivers cutting-edge 48Gbps bandwidth, supporting stunning 8K@60Hz and 4K@240Hz resolutions. Compatible with Thunderbolt 3, 4, and 5 ports, it ensures ultra-high-definition video and HDR support for laptops, desktops, and monitors. Its premium braided cable and metal enclosure guarantee durability and a sleek aesthetic, making it the go-to choice for professionals demanding flawless, future-ready connectivity.

Specifications

ASIN	B08MSWMXT4
Best Sellers Rank	#55,215 in Electronics ( See Top 100 in Electronics ) #714 in HDMI Cables
Brand	Cable Matters
Color	Gray
Compatible Devices	Laptop, Projector, Television
Connector Type	HDMI, USB
Current Rating	1.5 Amps
Customer Reviews	4.4 4.4 out of 5 stars (822)
Finish	Metallic
Input Voltage	20 Volts
Item Weight	0.02 Kilograms
Manufacturer	Cable Matters
Mfr Part Number	201388-GRY
Model Number	201388
Number of Items	1
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 Count
Warranty Type	Limited

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