Can this graphics card help me?

I have amd Athlon ii x 2 255 processor with Gigabyte M68MT-S2 motherboard. I have 2 GB ddr3 ram (planning to add 4 gb more).I know My processor and motherboard are low end but i cant replace them. I cant play any game after 2009 with lowest possible settings with my current graphics card( Nvidia GeForce 7025 / nForce 630a) which is inbuilt in my current motherboard.
So i am planning to buy Asus NVIDIA GeForce EN210 1 GB DDR3 graphics card which fits in my budget. Can this graphics card and 6 GB ram will be enough to play fifa 12 at-least.
I can increase my budget to buy Forsa NVIDIA GT610 2 GB DDR3 or ZOTAC NVIDIA GeForce GT 610 Synergy Edition 2 GB DDR3. Which do you think will be good graphics card for me.
thank you!

With 4GB of RAM you would need to install a 64-bit version of Windows 7 to take full advantage of the memory. The GT610 will be a better choice than the older GT210 but keep in mind that those cards are fairly low end, you shouldn't expect any miracles when playing intensive modern games at a reasonable graphical level. You should consider something like the HD6670 for average gaming.

In the long run you would need to replace this current system since the processor will likely be a bottleneck in performance.