Your system is a standard ATX system, so any ATX PSU should work fine with both your motherboard and video card.
Considering you're only using a GT 440, i assume that the rest of the system specs are around the same range(low end). I don't see a point in upgrading your PSU unless you're planning to upgrade to better hardware, if you just want to find a cheap PSU for less than $100 then i see no real reason to upgrade from your current PSU.
If you are in fact planning to upgrade, then i'd like to know the system specs of the supposed system in order to pick out a capable enough power supply.
Thank you so much for your reply, the reason I was asking about a PSU is cause i noticed this morning a weird smell coming from it, I couldn't tell it was a burning smell or not and it wasn't that hot either, more warm.
I just want to be on the safe side and thinking about upgrading it. Eventually yes I want to upgrade my computer but little by little for now.
My CPU is an AMD Phenom(tm) 9750 Quad-Core Processor 2.41 GHz
If you need any more info let me know, I'm pretty new to this so bare with me