i3, 8gb DDR3 ram, 1tb, GTX 1050ti, 1dvd writer, 1 portable scanner. How much Power is needed for the above mentioned system? Recommend a reliable and cheapest PSU from Seasonic, Antec, Cooler Master, Thermal take, Corsair. thank you...
With your system, you'd be lucky to see a 225w-250w draw with the pc totally maxed out, so recommend psu for a 1050ti is a decent 400w psu. The reason the CX is tier 4 and not really advised in your circumstance is its rated heat. It's a 30°C unit, and temps above that can mean minor to severe power efficiency loss. With Indian summers well in excess of 40°C ambients, the life expectancy of 30°C units is possibly quite short. The CX430 is one of the better CX, normally pretty dependable for low power needs, but your circumstances put it at 'iffy' at best.
550w is as high as I'd be looking for in your case. That's more than enough power for a gtx970 (my i7-3770K at 4.9GHz OC, (200w+ OC), with a gtx970 OC to 124% is powered by a Evga G2 550w)
Delta is a very good OEM, and Antec doesn't put out junk psus, even their low grade stuff is decent. I'd definitely go with the Antec VP. The CM masterwatt lite is Enhance, and while they can put out some superb psus, this isn't one of them.