Which one of these GPUs can run on Corsair VS 450 W

[propcsanu]

Hi
I have a 1 month old rig initially designed for non -gaming and is having a i5 3450 , Asus B75 Mobo, 4GB ram powered by a Corsair 450W. Now I feel like fitting in a mid-end GPU with this.Please suggest me a good option amongst these.- Nvidia GTX 650 / 650 Ti / 650 Ti Boost. I have read the specs of all these cards and all recommend 450 W . but I see in forums and reviews that all want to go for 500W , 750 W etc.Now I wonder what is the best card that I can fit in comfortably with the 450W PSU and not create any degradation. I am inclined towards Nvidia but is also ready to look into AMD HD series as well.
Thanks

 

[enemy1g]

Your specific PSU make and model would help.

But in general, you should be able to run a 650 Ti Boost or a 7850/7870 with 450W.

 

[propcsanu]

Specific model : http://www.flipkart.com/corsair-vs450-450-watt-psu/p/itmdbfa3kaffmum3?pid=PSUDBF9ZBHSJVGJ8

 

[enemy1g]

The VS450 supplies 34 amps to a 12V rail (I believe), and the 650 Ti Boost only requires 20 amps. You should be good to go.