So I got a new video card (Radeon RX 480) on my 64-bit Windows 10 computer and was pleased, until I tried to plug a second monitor into the Displayport port. It wasn't detected.

Further steps taken:

  • I got a Displayport to HDMI cord. No detection.
  • I ran Windows Update to see if it detected a need for any drivers. No detection.
  • I opened Device Manager to see if I could see any warning or error icons. Nothing.
  • I tried Control Panel > All Control Panel Items > Devices and Printers > Add a device and nothing was detected.

I've read other forum articles that say that Windows 10 hasn't released drivers for Displayport to HDMI cables. In any case, I'm out of ideas.

Does anyone know how I can resolve this issue and get the second monitor to be detected?

  • Passive DisplayPort to HDMI cable only works with DP++ (on display card) to HDMI (on monitor). Also get the latest driver here. – Tom Yan Aug 30 '16 at 3:36
  • I already have the latest and correct driver for the video card. The problem is the driver for the cord, which it turns out that MIcrosoft refuses to help with. HP only made drivers for Windows 7, and so now I'll have to contact HP. Oh, the joyous runaound continues. – RandomHandle Aug 30 '16 at 4:11
  • Can you confirm that you have a DP to HDMI cord (as in a passive cable) or do you have a normal active convertor (which may look like a cable but which has electronics build into the cable and often ships with an extra USB cable to server as powersupply for the 'cable'. – Hennes Aug 30 '16 at 6:57
  • It looks like a single cable without any other components. – RandomHandle Aug 30 '16 at 13:19
  • 1
    Why not DVI to HDMI? No signal conversion needed at all (both uses TMDS). – Tom Yan Aug 30 '16 at 16:50

As others have pointed out, this situation is not possible.

To resolve my problem, I had to get a DVI-to-HDMI cable.

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