65 Watt processor, 150. to 170 watt video card, might get 60 watts for everything else, with the overclock about a 300 Watt PC.
That power supply is low quality (420 watts on the 12 volt rail rated at a very low 30C) so about 75% of its rated output.
I would not use it if it was a high quality 450 watt power supply I would say yes but not with the low quality,