I just bought a new Dell P2415Q monitor and am having trouble getting it connected to my old Windows 8.1 PC with an nVidia GeoForce 710 video card.
It will connect OK to the monitor over a DVI->HDMI cable @ 3840x2160 @ 30Hz. 30Hz is fine with me-- no gaming or video playing on this PC.
But I want to connect it using a mini-DisplayPort connection (not HDMI) because I want to run the video signal through a StarTech 4K KVM Switch which only has mini-DP inputs. That's where I'm getting stuck.
What's the right cable and/or adapter to connect my video card (which has DVI and HDMI outputs) to a mini-DP connection?
I tried a Benfei 4K Mini DisplayPort to HDMI cable which didn't work. Not only did the monitor not detect a signal when running through the KVM switch, it also didn't work when I directly connected my PC to the monitor. This cable also didn't work when I tried connecting via the HDMI output of my MacBook Pro, so I suspect that the problem is the cable (or the cable+monitor combination) not my video card. FWIW, my MacBook Pro works fine mini-DP-to-mini-DP cable to this monitor, either directly connected or through the KVM switch.
So, should I:
- try a different brand of HDMI-to-Mini-DP cable, and if so what should I look for?
- try a DVI-to-mini-DP cable instead?
- get an active adapter between HDMI or DVI to mini-DP?
Finally, do cables and adapters have "sides", meaning that a Mini-DP to HDMI cable is different from an HDMI to Mini-DP cable?