Which psu Should I buy ?

Solution
For a system with a GTX 1050, something like this would be suitable. PCPartPicker part list / Price breakdown by merchant

Power Supply: EVGA - 450W 80+ Bronze Certified ATX Power Supply ($37.89 @ Amazon)
Total: $37.89
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-08-31 07:13 EDT-0400

or this PCPartPicker part list / Price breakdown by merchant

Power Supply: Corsair - CX (2017) 450W 80+ Bronze Certified ATX Power Supply ($39.99 @ Amazon)
Total: $39.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-08-31 07:14 EDT-0400
For a system with a GTX 1050, something like this would be suitable. PCPartPicker part list / Price breakdown by merchant

Power Supply: EVGA - 450W 80+ Bronze Certified ATX Power Supply ($37.89 @ Amazon)
Total: $37.89
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-08-31 07:13 EDT-0400

or this PCPartPicker part list / Price breakdown by merchant

Power Supply: Corsair - CX (2017) 450W 80+ Bronze Certified ATX Power Supply ($39.99 @ Amazon)
Total: $39.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-08-31 07:14 EDT-0400
 
Solution