Your power supply and graphics card are OK
But your cpu is running at 74.5C - way too hot.
Get it much cooler -
1. Blow your case out - especially fans, filters and coolers. (as I said above)
if that doesn't get the temps down to 35C idle, 50C gaming then
2. Re-seat the cpu cooler -
Remove the fan and cooler.
use isopropyl alcohol to clean the old thermal paste from the top of the cpu and bottom of the cooler.
put a pea size drop of new Artcic Silver 5 thermal past on the centre of the cpu. Put the cooler back on,. reconnect the fan.
if that doesn't get the temps down to 35C idle, 50C gaming then get a new cooler eg Coolermaster Hyper 212 evo