Which system should i get for gaming? please let me know asap!

2nd one..better cpu and video card.
Would you not buy and build yourself though?
Any site I see offering a 12ghz cpu is dodgy in my opinion.
There might be 4 cores but it's still 3ghz cpu.

i checked the costs to make a pc of this spec and it comes out to a lot more! its actually really good value

good grief, that first page was a mess! In fact, they all are in Firefox!

I'd go with the 2nd myself, although as airblazer said, very good prices! The only problem might be the NV 650 chipset limitting OC and high temps.