Thanks for joining the Intel communities.
I understand you have a video card XFX R7 260X not working with board model DH61BE.
You mentioned you tested the XFX R7 260X and another video card. Did they work on other motherboard models? Have you tried with another power supply? Higher power supply wattage?
I see the video card requires extra power. Did you connect 6-pin power cable?
I am looking forward to hearing from you.