RX 480 No Signal Problem

[SUP3R_FIGHT3R]

Hello Guys, How are you ? So today i've received my ASUS ROG STRIX RX 480 O8G today, and wanted to try it. First, i plugged it in, the GPU Is functional, but it gave me Low Signal Error, I Can see the system running, but with a low signal error in the middle of my Monitor. I restarted the build, same thing. So i plugged the HDMI to the mobo port. NOW, no signal. The system is running, but no signal, GPU is running but no signal. if I remove the GPU the build runs normally. So what should i do please ? Thanks

 

[kmr1154]

When you connect using HDMI, are you sure the monitor is set to auto select the video input? I am sure it is set to auto i am just asking anyway...

When you say no signal, it must be happening when you connect any cable to the gpu, have you tried connecting the cable to the onboard graphics on mobo while the gpu is still attached?

I am sure this is not a power issue... but just in case would you tell which psu you're using?