so the other day i came across the gtx 960 and i thought it would be a good idea to upgade my current gpu , the problem is i dont know how good of an upgade it would be from my gtx 750 ti so i decided to ask for help . I know a lot of you will probably say something along the lines ''save up and buy a gtx 970'' or ''buy and amd equivalent '' but even here lies a problem , first i cant afford the 970 in the close future and i need a gpu asap and for the amd equivalent i dont have the psu needed to feed them (i have a corsair vs450) so what do you think ? please let me know and thanks for the answers
(also the current model of the 750 ti i have is the palit stormX dual in case you wonder)

(also the current model of the 750 ti i have is the palit stormX dual in case you wonder)