Nope. The GTX 460 consumes roughly 141w of power from the 12v rail. That's nearly half the maximum power your PSU is capable of delivering on the 12v rail. There are other things that draws power from the 12v rail like the CPU, various drives and fans.
Without knowing the rest of your system, the best performing video card I would recommend is the HD 5750 which consumes about 51w of power. If it was at least a good quality PSU, then maybe the HD 5770 which consumes roughly 79w of power.
thanks, bat i goin to change the power supply