Deadlock03 :
ayushde :
Get this one then, it beats the hd 6670 gddr5 by a fair margin
http://www.flipkart.com/sapphire-amd-hd-7730-1-gb-ddr5-graphics-card/p/itmdpxqpbrgnzg6j?pid=GRCDPXQPFRTXST5Q&ref=da47b47f-277a-4ddd-ba8e-6bc79528954d
but bro my ram is of DDR3
The gddr5 mentioned (yeah its not ddr5, its a mistype) is the gpu vram and is bundled with the gpu board. It has no relation with your system ram and will even work with systems with ddr2 ram. So dont worry.
And your 2 gb ram is too less BTW. Try to upgrade to at least 4 gb to get better gaming results.