Question Is thermatake 730watt psu good for core i3 6100 and r7 360?

Aug 31, 2019
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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?