Yes, it might. Depend son what components you have and how much power they need. I only used once a 20 pin PSU on a 24 pin motherboard just to test if you motherboard is working. I didn't know if the motherboard or psu was broken and only had a 20 pin psu.
AC input(47-63hz) : 100-127v/6a
DC output: +5v=25A , +12v=14A
: +3.3V=18v , -12V=/0.8A
+5V & +3.3V SHALL NOT EXCEED 165W
+5V & +12V SHALL NOT EXCEED 218W
MAX OUTPUT POWER 250W
it looks to me that i might have to get a better PSU if i really implant a videocard.
You need to replace that PSU. At best, it works fine, but is an older, inefficient design that probably also does not provide enough of its amperage on the +12V rail(s) where it is needed by a modern PC. At worst, it will overload and croak, taking your mobo and/or other parts with it.
You don't need a powerful one, but you need a quality one. If the video card you decide to get does not need auxilliary power from the PSU (up to an ATI 4670 or nVidia 9500GT or "low-power" 9600GT), an Antec Earthwatts 380 would be sufficient. Use a 500W model for more demanding single video cards. If you cannot get, or don't want Antec, other good brands include Corsair, PC Power & Cooling, Seasonic, and Enermax.