gtx 750ti on my PSU

Most if not all 2 fan setups like the ftw edition require the 6 pin connectors, and can pull more than just the 75 watt provided by the pci slot. If you can't upgrade the psu then I would suggest the zotac version of the 750ti that does not need the 6 pin

Edit: turns out that card only uses the pci slot so there is no need for additional power but that also limits over clocking substantially even though I wouldn't overclock with that psu anyway. On paper it would work but I would suggest changing the power supply before buying a graphics card
 


Exactly, one needs to check the card for that extra 6-pin PCIe connector that is not wanted in this case. Sometimes online stores are not specific enough, check the manufacturers' sites.
 


EVGA GeForce GTX 750Ti SC 2GB GDDR5
MSI N750TI-2GD5/OC
Gigabyte GeForce GTX 750 Ti LP


 
That is a special 950 made by ASUS to work on the 75W provided by the PCIE slot(i already specified that in teh prev. post). So how would it require 25 amps?(25amps x 12v = 300W)
http://www.amazon.in/ASUS-GeForce-GTX950-2GB-DDR5-PCI-E/dp/B01DDA6VRE/ref=sr_1_1?ie=UTF8&qid=1464206131&sr=8-1&keywords=GTX950-2G

If you are skeptical, than this is an ok 750ti http://www.amazon.in/ZOTAC-GeForce-Graphics-Black-Orange/dp/B00IFZ547Q/ref=sr_1_6?ie=UTF8&qid=1464206888&sr=8-6&keywords=750+ti

Liek i said, i recommend the 950.
 
You can comfortably use ANY gpu that does not require a 6 or 8 pin power connector. If you look at a card on a website, in the specification, it will tell you if it requires an external power connector. If it doesn't, you're good to go.

Youe best options are the 750TI, or as Hlsgsz suggested, a 950.

A quick search on any website that sells components in india will give you that information.