Cable Matters 4K Active Mini DisplayPort to HDMI Adapter (Active Mini DP to HDMI) Supporting Eyefinity Technology

I have, I think, a bit of an unusual set up so I'll explain that first and why I ended up buying this adaptor.My home PC has an RTX 2080, which only has a single HDMI port and many full size DP ports. The HDMI port is taken up by an Oculus Rift, and I was running an old 24" 1920x1200 60Hz monitor using an Amazon Basics DP to HDMI adaptor and an Amazon Basics 10m HDMI cable, as my PC is actually in the living room so I have more space for VR.This was all working fine... until I upgraded to a 32" 2560x1440 144Hz monitor a few months ago, where the Amazon adaptor just wouldn't work at any more than 1920x1200 60Hz, so I had to use the HDMI port instead and keep swapping cables whenever I wanted to use the Rift. The HDMI port was working fine, so it must have been something to do with the Amazon adaptor. That's now solved with a fibre DisplayPort cable, and also means I can have a dual monitor set up with my old monitor back on the Amazon adaptor and 10m HDMI cable... not that I really need it on my home PC...What has any of this got to do with a mini DP to HDMI adaptor? Well, I work from home half of the time and having two monitors is actually rather useful there. My work laptop has an HDMI 1.4 (I think) port and Mini DP port. There are plenty out of mini DP to HDMI adaptors out there, but most state a max resolution of somewhere around 1920x1200 60Hz, which appears to match my experience with the full size DP adaptor that I am using on for my home PC. I took a punt on this one as it states that it supports 4K at 60Hz, and I can happily confirm that it's working fine at 2560x1440 144Hz!There is a review claiming that this is not an active cable. I honestly have no idea if it is or isn't, but it's working fine for me. I don't think the Amazon Basics full size DP one stated the HDMI version or whether it was passive or active, so it could just be as simple as this one is HDMI 2.0 whereas the Amazon one is only 1.4, and nothing to do with passive vs active? No clue, but I'm happy!

I've used it for ca. 6 months and so far absolutely no issues whatsoever!The picture qualit is great, and I get 60 fps on my 4K screen. I actually even forgot that the HDMI cable was attached to the computer via the adapter, so definitely works great.Seems pretty high quality, and does what it's adertised to do.I'm pretty happy with it.

I converted my old 2011 27inch iMac to a monitor and decided to use a Mac mini 2012 hooked up to it. but because the controller board on the converter only has HDMI I could only get 1080p on the iMacs 1440p screen. using this adapter I achieved the the screens maximum resolution I required a fantastic product.

Had the very common problem of the second monitor I bought not waking up/receiving a signal from the mini displayport/Thunderbolt port on the Mac Mini. I had previously bought a mini-displayport to displayport cable to use with it and it worked very briefly the first time I plugged it in but never since. Then came across a video saying an *active* mini-displayport to DVI adapter was needed to use an Apple-branded monitor with it. So I looked for an active mini-displayport to HDMI adapter hoping that would do the trick, found this one and it works great.Works on Mac OS, and also works in Windows 10 via Bootcamp.EDIT: After a couple of days, it's now not waking up the second monitor after the Mac has properly gone to sleep in Mac OS. Just get an initial flash of green lines and then no signal. But it does work upon rebooting, which is better than before.

Totally solved my issue of not being able to get 4k @ 60hz on my mac pro 2013.I'd tried 4 other cables / adapters and this one solved it immediately

Great. I now have 3 HDMI Monitors (27”) connected to my Mac Pro 2013. Two on 7m cables and one on a 10m cable. No additional boosters anywhere! It seems the “Active” chip in the adapter is key to achieving this setup. Picture is clear and stable at (1080p) providing a much improved work screen spread for my Logic Pro system.

The adaptor failed after around 30 seconds of use. Might be a random occurrence, but it's still a pain in the derriere having to return it and get another or an alternative.

Works with Surface original dock and a 4k screen. Non active connectors don’t.