Keymox HDMI 2.1 8K Cable (10ft) — 48Gbps support for 4K@120Hz & 8K@60Hz
Product description
What this cable is for
If you’re trying to get the most out of an HDMI 2.1 setup—especially for newer consoles, streaming boxes, and 4K/120Hz gaming—this Keymox HDMI cable is built around that goal. On paper, it targets the bandwidth you need for higher resolutions and faster refresh rates, with support for features like Dynamic HDR, eARC, and Ethernet.
In day-to-day use, that usually shows up as fewer “it won’t do that mode” headaches when you plug into an HDMI 2.1-capable TV or gaming device. For example, you can connect a PlayStation 5 or Xbox Series X/S to a compatible display and try enabling 4K@120Hz in your console settings—assuming your TV supports it and your signal chain is set up correctly.
Key takeaways (the part that matters)
This cable is positioned as a full-bandwidth HDMI 2.1 option, not a basic “works fine at 1080p” cord. The listing emphasizes a 48Gbps bandwidth and support for: - up to 8K@60Hz and 4K@120Hz - Dynamic HDR - eARC and Ethernet - HDCP 2.2, plus typical HDMI features like CEC and 3D
There’s also a small nuance in the wording: it mentions 4K/120Hz “without DSC,” and 8K/120Hz “with DSC.” That’s a detail worth paying attention to because it hints that not every extreme mode is guaranteed the exact same way on every setup. Still, for most buyers chasing 4K@120Hz gaming and modern HDR, the headline spec is the right direction.
What you’ll notice in use
The cable uses a 28AWG high purity copper conductor and a gold plated connector. That’s the kind of build detail that can matter if you care about stable connections across devices—mainly reducing the odds of signal dropouts compared to cheaper alternatives.
The “10ft (3.0m)” length is another practical factor. Ten feet is long enough for most media setups where your console/streaming box sits under a TV, in an entertainment center, or slightly off to the side. It’s not so long that you typically have to worry as much about cable routing, but it can still be a comfortable reach.
One more real-world point: the product listing calls out universal compatibility with popular devices and services (including Apple TV, Nintendo Switch, Roku, Xbox Series X/S, PS5, Blu-ray players, and more). That’s helpful for shoppers who don’t want to play guesswork with compatibility.
Where it shines—and where it may fall short
This is a strong fit if you’re specifically looking for an HDMI 2.1 cable that can handle modern TV features and console gaming modes—especially if your TV supports 4K@120Hz. The Dynamic HDR and eARC support also makes it a candidate for setups where you want more consistent HDR behavior and audio return from a soundbar or receiver.
But keep expectations grounded. HDMI 2.1 bandwidth and feature support don’t automatically guarantee every device will enable every mode at full capability. TVs, consoles, and ports all have to agree on the format. Also, the listing includes a specific note about an LG CX48 + Nvidia 3080 HDMI output scenario at 144Hz, saying there’s no compatibility issue when using this cable. That kind of statement is exactly the sort of thing you should treat as “setup-dependent,” not as a universal promise for every PC/GPU combination.
Tech specs (as listed)
- Name: Keymox HDMI 2.1 8K Cable (10ft)
- Type: HDMI cable
- Format: Ultra HD High Speed / HDMI 2.1
- Size: 10ft (3.0m)
- Capacity: 48Gbps
- Supports: 8K@60Hz
- Supports: 4K@120Hz (without DSC)
- Supports: 8K@120Hz (with DSC)
- Features: Dynamic HDR, Dolby Vision (mentioned), HDCP 2.2, CEC, eARC, Ethernet
- Connector: Gold plated
- Conductor: 28AWG high purity copper
Should you buy it?
It’s a solid pick if you want a longer HDMI 2.1 cable that’s designed for higher-end picture modes (like 4K@120Hz gaming) and you also care about HDR and eARC support. If your setup includes devices such as an Xbox Series X/S, PS5, Nintendo Switch, or Apple TV and your TV supports the relevant modes, this cable is built to match that requirement.
It might not be the best choice if you’re only using basic resolution needs, or if you don’t care about 4K/120Hz, HDR formats, or eARC—because in those cases, you’d likely be paying for features you won’t use. And if you have a very specific PC GPU + monitor/TV refresh-rate combination, you’ll still want to verify compatibility and supported modes in your device settings, since HDMI handshake behavior can vary.
FAQ
Does this support 4K@120Hz?
Yes, the listing says it supports 4K@120Hz (without DSC).
Does it support 8K?
It’s listed as supporting up to 8K@60Hz, with 8K@120Hz mentioned “with DSC.”
What HDR features does it mention?
The cable is listed as supporting Dynamic HDR and it also mentions Dolby Vision.
Is it good for soundbar/receiver setups?
The listing includes eARC support, which is the feature people typically look for when they want audio return from the TV.
Is 10ft long enough for typical entertainment setups?
Ten feet is generally a practical length for TV stands and media consoles where your devices are not directly beside the display. If your setup needs a shorter run, you may prefer a smaller length to keep cable management tidy.