pc wont recognize monitor

[ree6]

I have bought a new PC and the store built it for me, when I boot it the fans work but there is no signal for the monitor, the monitor also has power but it wont detect the PC.
I have amd dual-xsapphire r9 270x as a GPU
I use a VGA that is connected directly to the motherboard (I think) in the manual of the gpu it sais that it is possible to connect a VGA.
thx for the help

 

[alexoiu]

Did the PC work at the shop?
I'd take it back to the shop for testing, since under warranty.

 

[eldapeeze]

Do you have GPU? If you have a gpu you should connect the VGA on the graphics card, not the motherboard.