Max power draw of the GT 440 is 65W and Nvidia recommends a 300W PSU..it is definitely worth a try with your old PSU and I'm willing to be that you'll be good to go.
THANKS A LOT. I really needed this and I would be good to go to build the system since I wasn't sure. Of couse in 2 months or so later I will probably buy a 400 watt power supply but this is what I needed to know. Thanks