i bought a new gpu recently (R9 390 8GB PCS+) and i just cant get it to run. I also bought a brand new psu 850watt gold. When I connect everything up my screen doesnt seem to get any signal. One wierd thing is that my keyboards Num/Caps/Scroll lock is turned on and my mouse isnt powered at all. I have an old motherboard (Intelboard DH77EB), old cpu (Intel i7 3770) and 8GB DDR3 ram. I am 100% sure that everything is plugged in correctly but it just doesnt want to start up. the gpu's fans start up too and it worked on my friends pc but i cant understand why it doesnt on mine. Please help!