Looking up on that Zebronics PSU. Never heard of Zebronic either, not a good sign.
Glows blue, doesn't mean its bad, but gimmicks like that are often used to sell bad units.
No reviews anywhere for it, and what forum posts I have seen about it aren't good.
On its product page, there is no information given about its rating, efficiency or any indication of 80+ Certification. Not a good sign.
However, it does tell us amperage on the various rails. 24A on the 12V = 288W. This unit has no business being called 600W, cant even output half its advertised wattage. Much more likely this is a 300W unit with a 600W sticker slapped on it.http://www.zebronics.com/products/platinum-series/zeb600w
I would advise you replace it. A good 650W unit from Corsair, Seasonic or XFX will do for the rig as it stands.