Triple Monitor R7 250 with Dell Monitors and DisplayPort

[Rakshasas]

Hello, I am trying to put together a new workstation and I've run into an issue with my triple monitor setup. I am working with a brand new Dell Optiplex 9020, which has an R7 250 GPU. I have two U2414H monitors which came with the order as well. The first monitor I plugged into the GPU using the mini DP port and the second monitor is daisy chained of the DisplayPort. The two of them work fine once I enabled DisplayPort 1.2 on the monitors.

I took an older P2210 monitor, which has a DisplayPort as well and added it to the daisy chain. I was sure to make sure DisplayPort 1.2 was enabled on both the U2414H monitors.

AMD Catalyst detects all three monitors but I can't seem to extend the desktop to the third one. It asks me to disable a monitor before I can continue. I'm under the impression that my video card is capable of having four monitors extended at the same time, and using DisplayPort is how to accomplish this.

I even unplugged the P2210 and used the DVI connection and it was no different. Why can't I do this?

 

[ATMINSIDE]

What model of R7 250? It seems that some support 2 and some support 3 monitors.

 

[Rakshasas]

I'm not 100% sure. It has 1 DP and 1 DVI port and is a 2048 MB card. PCI E 3.0. Apparently it's DD3 which surprises me.

It came from Dell but I can't really find a part with the same specifications as what is detected by the Catalyst drivers.

 

[ATMINSIDE]

There's only a select few that support 3 monitors, so I'd say yours is the 2 monitor version.

If it's a system with integrated graphics on the CPU or motherboard, try using that for the third monitor.

 

[Rakshasas]

That means my ability to research is subpar to horrible. I recall looking into R7 250 to make sure this wouldn't be a problem and found that it could do 4. Clearly I misunderstood.
I enabled the onboard GPU and I have my third monitor going that way as you suggested.

I appreciate your help.

 

[ATMINSIDE]

Glad it works with the integrated GPU