We often get this question on how many displays you can configure on the R7 260X series.
Here is the answer;
1. You can connect 3 displays 2x DVI + 1x HDMI without using active adapters.
2. You can connect 4 displays by using 2x DVI + 1x HDMI + 1x DisplayPort (DisplayPort display required)*
*If you do not have a DisplayPort Display you must use an active adapter
3. You can connect to a maximum of 6 displays by using a MST Hub via the DisplayPort output
MST Hubs are DP++, if you require a conversion from DisplayPort to HDMI for example, you can use a passive adapter
Club 3D recommends the CSV-5300A MST Hub 1-3 DisplayPort or the CSV-5300H MST Hub 1-3 HDMI
What is your configuration?