This PSU any good, or will it screw my other components up

i just googled it and it seems to be not so good a brand get a corsair, thermaltake, seasonic, or a coolermaster for the price difference of 10£/$ u can get a corsair which i would say is your best bet.

Cant go wrong with corsair and yes 650 is plenty of wattage for your system if using a good brand PSU