Lastweek I have fps drops while playing League of Legends. Then I noticed my gpu suddenly running on pci-e x4 instead of x16. When I reinsert my gpu to the pice slot, it has no display and the fan stops spinning for every 5seconds. Then I insert my gpu to other PC and everything works well including the fan. Im suspecting my PSU has the problem since it suddenly running on pci-e x4 and the fan stops spinning for every 5seconds. Thanks for your help. I need to know which part I should replace the gpu or the psu