GTX 750 Ti on a local 450w PSU

Apr 28, 2015
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I will Buy a GTX 750 Ti (Probably the Zotac one) Tomorrow and I have a local 450w( a super-comp one)
I know it need like 300w PSU and no PCI-e Cable..............
I will Probably buy a 500w Cooler Master PSU later on..............
I also don't have a Power Hungry CPU.....its a Pentium G2030.....and 4GB of RAM.....
Will the card run with out any OC ?????

My previous Card was a GT 730 ,which I literally bought 21 days ago.... >_< .....totally waste of money.............
How much improvement am i looking at???