If you have fan speed control turn the speed up to keep it cool. Quiet fans, till the PSU heats up, means you have just made a nice thermal capacitor cooker, which is almost designed to cook the power supply capacitors to the point they fail just out of warranty. Just replaced all the secondary caps on my PC, generic Fujitsu I bought used, and fan got a tiny speed bump to run faster, plus added an extra case fan running off 5V to stir the inside air more, dropping temperature a lot. Rest of PSU well made, just cooked capacitors on secondary, and also replaced all the small primary side electrolytics as prevention as well.