Your CPU is at 70-77C, fan 1785 rpm, Vcore 1.072-1.224V. Check these readings in bios/uefi.
Have you tried to OC your CPU? Drop Vcore by 100mV and see if the temp improves. My 3930k runs at 0.9V idle
If temp doesn't improve, check your pump rpm. Re-seat the water block.
Also your PSU 12V reading is a bit higher than normal - 12.288. Check it again in bios/uefi.