Im getting a 9600gt but my power supply is CoolerMaster 350W . Is there any chance of working ??
It should be OK depending on the rest of your specs.
if it's a proper cooler master psu (not those ones you get with the box) it should run fine, only problem would be if you have lots of harddrives, fans, etc.
No . you should get a new one that gives 450W or more