Can my Zebronics Power Supply ZEB-450W value plus support GTX 750 Ti or GTX 750 Ti OC??

Solution
Zebronics only makes cheap, unsafe and unreliable power supplies. They are a Tier 5 "replace immediately" manufacturer. Using one of their power supplies in ANY computer is a bad idea, much less one with an aftermarket graphics card. You want something that is at MINIMUM, a tier 3 unit. A tier 1 or 2 unit would be a much safer, wiser choice. Even a crappy Corsair power supply would be miles above that Zebronics unit. I would highly recommend you not use it with any gaming card or overclocked system, or any system for that matter.

PSU Tier list: http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html
Zebronics only makes cheap, unsafe and unreliable power supplies. They are a Tier 5 "replace immediately" manufacturer. Using one of their power supplies in ANY computer is a bad idea, much less one with an aftermarket graphics card. You want something that is at MINIMUM, a tier 3 unit. A tier 1 or 2 unit would be a much safer, wiser choice. Even a crappy Corsair power supply would be miles above that Zebronics unit. I would highly recommend you not use it with any gaming card or overclocked system, or any system for that matter.

PSU Tier list: http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html
 
Solution