GeoHN.G 8K Fiber Optic HDMI Cable 10M, 48Gbps High-Speed HDMI 2.1 Cable 4K@120Hz Dolby/Dynamic HDR/HDCP 2.3/eARC Compatible with Blu-ray/TV Box/HDTV/Projector

I was concerned about possible latency and HDMI plugs overheating, however I needn't had been concerned. Not even warm to the touch, and no real-world latency, i.e. well below 1ms.This cable just delivers what it promises. Copper cables tend to be device sensitive, for example even if the cable is certified, it may not function correctly with some devices at high bandwidth due to any number of issues such as HDMI port quality (the receptacle that you plug the cable into, both ends). Many of the HDMI switches tend to have compatibility issues because they tend to use rather cheap physical HDMI ports. Even the latest TVs have been noted to skimp on port quality (one could argue it is to help bring prices down, some would argue it is about keeping profit margins high and not the presumed assumption of bring consumers lower pricing).I would recommend to nearly always try a good quality copper cable (certified), because you save on a little bit of electricity (less than a watt for these HDMI optical cables), and if you can get away with traditional copper cabling, great, but only resort to optical cables when coppers just don't give you what you need with your setup. Indeed for longer runs it is always better to go with optical for high-bandwidth requirements.This cable is good, rather flexible slim cable. I wouldn't recommend this cable for tasks where constant removal and plugging is part of the job description as they are not built like the heavy-duty monster copper variety designed for 'military style' handling.This cable doesn't have any strain relief, it has just a short gland at the rear of the plug which is clamping the cable into the plug, to be honest it is all you need as the cable is quite flexible, but this isn't the type of cable where you would constantly pull on the cable itself, unplugging by pulling on the plug rather than cable is advisable for a cable of this design.Happy with the cable, if you're looking for upto 8K 60hz bandwidth support, this one is a bargain.

Worked well for a month then suddenly stopped. PC and monitor detect the cable is plugged in but will only display a black screen.Tried on a different device, same result.Tried a different cable and that works fine so clearly something has gone wrong in the cable.It failed 2 days out of the return window, would not recommend it.

Well to start off these cables were not bought out of need they were bought for experimentation as I have all high quality copper wire based cables throughout my AV system, but felt the need to try this new technology and boy was I surprised. The first test was to connect my Denon AV receiver to my Philips Hue Ambi light sync box. I then took a 2mtr fibre optic hdmi cable out of my Denon AV receiver and connected this in to the input of the Philips Hue sync box, I then took a 3 mtr fibre optic hdmi cable out of the Philips Hue sync box in to my LG 65'' Oled Tv hdmi socket and did a good test and reviewed the picture quality this turned out to be impressive and with no perceivable artefacts or other picture issues such as loosing signal or e-arc compatibility these were all used on the highest video output settings which was HDMI YCbCr Chroma 4:4:4. after this I ordered another 2mtr fibre optic hdmi lead for my latest model Apple TV 4K as many will know these are one of the best streamers you can get for picture quality but the very worst for cable matching when using the highest video settings this also worked perfectly including running the Apple hdmi test to check cable suitability this test was passed with flying colours, my whole system has since been running perfectly since the install with no perceivable loss of quality or other issues. As many will be aware the true benefit of these cable will be when lengths greater than 3mtrs are required this is the time copper based cable picture quality can suffer and when the true benefits of fibre optic come in I will be buying more to replace my copper based one's especially the longer than 5mtr lengths as I want to move my main streaming box to another location overall really impressed with these cables. Would love to see what the performance of the 20mtr one's are like though. Overall a very happy customer.

I bought two 7.5m versions of this cable with a tasty discount meaning they were not much more expensive than their copper counterparts. I had to go optical as I needed to fit 2 cables into the space that a single copper cable was occupying in some trucking, even the thinnest copper cables I could find were too thick with all the shielding and braiding. These on the other hand are not much thicker than your average USB cable.Happy to report that out of the box they work as advertised, carrying 4K 120hz Dolby Vision and Atmos from my XBOX to my LG OLED with out any issues.The only issue I seem to encounter it that sometimes the LG TV will not detect the signal on the HDMI port and say ‘No Signal’ if I switch to the input after the source device is powered on. If I then switch the source device off and on again it will come back to life. Possibly without the electrical signals the TV has a harder time detecting an active input, I’m not sure. Definitely only happened since switching to this cable however.All in all still very happy with these for the price. Just hope they last as some reviews point to failure after several months, will update if this is the case.EDIT: ok there does appear to be a problem with the way this cable works that causes the signal to the TV to be lost when the source device changes resolution/refresh rate while active. This is most common for me when switching between the XBOX Home Screen and a game, the screen goes black and the TV reports no signal. Sometimes (rarely) this corrects itself after a few seconds, but in most cases it requires me to power cycle the XBOX to get the signal back.