At the 600 to 650 Watts range, the Antec HCG 620M is the better power supply for the price since the price is probably what lead you to look at the CS650M.
Hi arun1994s
The corsair cs650m has low grade capacitors
i would suggest a psu with high grade japanese capacitors from
seasonic/xfx or any psu from corsairs TX,HX or AX range