Silverstone strider essential 400watt PSU can cope up for i5 4460 + GTX760?

Solution
No, for GTX 760 at least a 500W with 2x6pin PCI-e power cables capable psu will be needed. a 400W PSU cannot run such GPU.

EVGA/ SeaSonic/ Antec/ Super Flower/ XFX make the best PSUs. Get atleast a 520W HCG or XFX Pro 550W.