Review on 🔌 UPTab DisplayPort 1.4 to HDMI 2.1 Active Adapter with HDR Support - Experience 4k 120Hz or 8K 60Hz with HDR on PC or Tablet via HDMI Enabled Monitor, TV, or Projector by Billy Branch

These things are like a minefield for navigation as the vast majority of them just lie about their capabilities. Knowing that the vast majority of their customers are likely only dealing with 1080p signals, some perhaps 1440p. and a few with 4k @30. However, they boldly claim that the device can play 4k at 60Hz. which in turn the vast majority cannot do at all. This one will try as you will get the initial picture but then it will turn off then turn on then turn off then turn on again. as it just doesn't have the bandwidth for all that data. Try Oculus and nothing. The headset is recognized by the computer waiting for it to work, but all you see is a black screen inside. Perhaps a faint indication that the image tries to start but then goes black again. I tried it with Lenovo Thinkpad @ 4k 60, same results. The same applies to 3 HP, Dell and Toshiba laptops. It works at 4k 58Hz. but not 59 or higher. and I suspect the closer you get to 60, the more likely you are to lose tons of frames in a big trash can from time to time. So 4k 30hz is the MOST I would say this thing can handle. So it works for Blu-ray players, DVDs, HD set-top boxes, etc., but do NOT try to use it on a high-resolution PC for ANY reason. Not suitable for that at all. although they are clearly marked as such in every respect and in every place. It's all lies. The device is likely quite capable in some respects, especially at lower HD resolutions. But that's not what I bought it for, it's not advertised as limited. For my needs and given the product description I think 1 star is actually pretty generous. since it's a $30 item, it does absolutely NOTHING in this case. nothing at all. Besides adding a lot of time to solve this problem.