Of couse you can use 1050ti. 1050ti is low power consumption
And please notice your I5 750, if you OC the frequency over 4.0,the PSU will boom quickly.
i agree with @boju and @bignastyid here, the RS-460, also known as the Extreme Power Plus seems to be from around 2009, has ~300w on the most important rail and doesn't meet things that are considered basic by today's standards (c6/c7 sleep states, having UVP and so on)
i would highly recommend to replace it by a modern unit that does meet it, with known examples being the Corsair CX, Bitfenix Formula and many more, i can guide on that part if you can give your country and budget