So basically i just realized today i have a 550w power supply and i have a XFX r9 280x ( http://www.newegg.com/Product/Product.aspx?Item=N82E16814150678&cm_re=xfx_r9_280x-_-14-150-678-_-Product ) and from what im seeing it says it need at least 750w and i only have 550w and this computer has been going for 2 years now and i came across this since i wanted to get a gtx 1070. I have had issues and could this be whats causing it? My issues have been that somtimes my computer would just give me red verticle lines randomly (Mainly when watching videos or when going on twitter) and it looks like this ( https://www.google.com/search?q=amd+red+vertical+lines&rlz=1C1ASUC_enUS644US644&espv=2&biw=1920&bih=955&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjsoOjdvIXPAhUDID4KHQH9DVUQ_AUIBigB#imgrc=ThVJ4HuBepAH5M%3A ) it wouldent always be red but just vary in color but is this the reason it has been happening? I have resolved this issue by down clocking my pc to 640Hz Gpu Clock and my memory clock is at 1000 Hz. So does anone know if this is the problem?