Guideline: Gaming-PC for your budget!

[KaBooM]

Thanks for updating this hitman... cool

Btw...
AMD  HD 7770 1024MB, Radeon HD 6770 1GB, or Geforce GT610 2GB.. which one do you think is better?

Of course GT610 is the cheapest among these but it would be useless if its performance isn't good enough.

And my CPU is a Pentium G620 Dual core 2.60 GHz.