I don't think the 650 Ti would work with that PSU, it requires a decent 400W PSU that pushes 20A on the 12v rail. Your best bet would probably be a 7750 or so unless you are willing to upgrade the PSU.
Actually I have this computer for one year with no use. I didnt had the money to install a new graphic card. I dont remember
sorry. But i believe is a 2.4 or 2.8
I have an Dell Xps420 im changing the psu for a new Corsair cx500 and is a cable for the processor power connector that i dont have...
Can somebody help me?