It ran perfectly well with a h170 board with a 550w litepower but i changed the board with a z270 and the cpu is overheating. After a few minutes of start up the display signal gets lost. Please help me guys . Do I need to change the PSU? Or it might be the problem of bad cpu pasting ( which is almost 4 years and most of the paste has come off). Should I change my psu to 730W SE smart power?