Intel HD4600 whit r9 280X problem

[unsoindovo]

Hi guys.
I have win 7 with i7 4770 that has the HD4600 integrated graphics and 4 280x.
I installed the gpu on the mobo, or better, connected with risers and are physically out of the pc case.
https://www.dropbox.com/s/lpyc4cwmo8s2am4/IMG_20140311_223024.jpg
When I installed the GPU on the mobo i can not use the video outputs of the motherboard.
I mean the HD4600 output.
None of the three works.
no hdmi, no vga it, no hdmi.
I must connect the monitor cable to the first gpu-video outputs: all mobo video output are disabled.
In bios I have not found anything to forse the use of hd 4600 instead 280x.
In practice, I would always use the HDMI output of the mobo/HD4600 regardless of whether it has the GPU connected or disconnected plugged in to the mobo.
you have no idea how to proceed?
there is some setting in the bios to fix this issue?
I have a MSI H87-G43 mobo.

[unsoindovo]

Hi guys.
I have win 7 with i7 4770 that has the HD4600 integrated graphics and 4 280x.
I installed the gpu on the mobo, or better, connected with risers and are physically out of the pc case.
https://www.dropbox.com/s/lpyc4cwmo8s2am4/IMG_20140311_223024.jpg
When I installed the GPU on the mobo i can not use the video outputs of the motherboard.
I mean the HD4600 output.
None of the three works.
no hdmi, no vga it, no hdmi.
I must connect the monitor cable to the first gpu-video outputs: all mobo video output are disabled.
In bios I have not found anything to forse the use of hd 4600 instead 280x.
In practice, I would always use the HDMI output of the mobo/HD4600 regardless of whether it has the GPU connected or disconnected plugged in to the mobo.
you have no idea how to proceed?
there is some setting in the bios to fix this issue?
I have a MSI H87-G43 mobo.

ok..
resolved
from bios under integrated peripherals -> change from PEG to IGD.
and you can use the hdmi mobo even with the gpu installed.