No Video Signal with Cable Matters HDMI 2.1 certified active cable

I bought this cable https://www.cablematters.com/pc-1337-139-certified-active-ultra-high-speed-hdmi-cable-fiber-active-optical-8k-hdmi-cable.aspx to use in the spectrum, and have successfully used it with the same GPU (with an EVGA 3090) on my 4k 120hz tv, which supports hdmi 2.1. But in the spectrum, I get no video output. I can use other shorter and non active hdmi 2.1 cables which work just fine, but these aren’t an option as I need a cable that can span over 50ft.

Is there a fix in mind? I know for a fact this active cable fully meets the specs due to a number of reviews and analyses, and Cable Matters has a long history and reputation for making quality cables.

I’ve tested the Cable Matters cable with other monitors with the same GPU, works just fine. I’ve tested other 2.1 cables with the Eve spectrum and same GPU, they work just fine. The spectrum clearly has a bug with this specific active cable.

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Hi @Andrew_Kennedy,

I know you’ve probably done this but can you please verify that you have the source end and display end connected the right way, with the source being plugged into your PC and display plugged into your monitor.

I have indeed done this, as the cables have the ends labeled clearly. I tried reversing it just in case the cable had a serious defect of reversed labels, but nope.

For additional clarification, the GPU is a 3090 FTW3 ULTRA by EVGA, and I’m running the latest nvidia drivers on windows 10, version 497.09

What I would try and maybe suggest to do is it’s not having enough power delivery, I would spilt the cable up 2x 25 ft maybe and add a hdmi 2.1 switch that supports power to it. Seems eve s needs a bit more power from the hdmi cable.

I’m not sure what you’re asking… Eve is not “powered” over hdmi, that’s not how hdmi works… Hdmi is 5V only and cannot possibly power a monitor.

@MarvyMarvz wanted to link you back in explaining that I’ve tried your suggestion.

Yes, but the longer the cable the decrees in voltage that’s goes along it. Hence why you would split the cable up in 2x25ft and add a switcher or splitter with power input that would ensure that the hdmi is still running 5v to display.

Hi @Andrew_Kennedy,

Apologies for the delay.

I’ve looked into the Active HDMI 2.1 Cable you’ve purchased but I believe it’s only designed for consoles (Xbox Series X Especially).

It’s an active caboose though, with circuitry to prevent this from happening. That’s the whole point of active cables.

Is there an officially recommended active 2.1 cable that can be used? One that’s longer than 10ft?

Hi @Andrew_Kennedy,

There’s not, unfortunately.

I’ve been looking around and the only active HDMI 2.1 cables that are somewhat trustworthy are these.

Where are you based, if I may ask?

I’m based in the US, in California. I know the active cable I bought has full certification for 2.1 and works great with other hdmi 2.1 sources and sinks so I’m just trying to figure out what I can do to make my monitor work a passive cable would be too short for what I need :sob:

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@MarvyMarvz I just wanted to follow up and the problem definitely seems to be with the Spectrum monitor. It does not work with any active cables I have tested, including https://www.amazon.com/Monoprice-Cabernet-Ultra-Active-Speed/dp/B015121JHY/ref=sr_1_3?keywords=active+hdmi&qid=1642157435&sr=8-3

I tested my existing cable matters cable and this monoprice one with my LG C9 TV and my PS5, and both work flawlessly. Am I able to return the eve as I absolutely must have support for long cables to make this monitor at all worth it.

Hey @Andrew_Kennedy I will ask the community team including @MarvyMarvz if we can recommend an active cable for you. I am personally not aware of any one reporting an active cable that works but that doesn’t mean the answer isn’t out there!

For returns you need to create a support ticket - the support team can help you with the return process.

edit: oops forgot the support link Support – Eve

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