Sir i need to buy a new graphics card that can just run all latest gam but not at the highest lvl as i am a school boy.I have a AMD Phenom2x4 core 3.4ghz,$gbof RAm,Gigabyte 880GM USB3l motherboard and mu current GPU is Nvidia 210.<crap>
That's about the best you can do for $100, and it doesnt disappoint. I have the same one in one of my computers, and its perfect. Plays everything I need it to, and it will definitely outpace your GT210.
Agreed you will see a whole lot of difference. It is too bad that your budget is what it is because with your CPU you could do a lot better then the 6670. But I understand any how Good luck to you.
So if you are strict on your budget and have a PSU that has at least one PCI-E connector you can get the 6750. If you have a little lenience then the 6770.
If you don't have any PCI-E connectors on your PSU you can get the 6670 GDDR5 and stay in your budget, or get the 7750 and go a bit over.