I don't think he was asking for a 'processor only' because he said a 'cpu configuration'
That means a whole rig and without monitor,keyboard,mouse,OS,etc i hope
And 20,000 INR is not 320 USD since the prices are higher because of taxes that budget is closer to 230 USD
If he raises his budget to 31,000 INR then we can start talking.
He can get an AMD APU system at the very best at this budget like this
http://www.tomshardware.com/reviews/build-your-own-budget-pc-overclocking,3623.html
There are also gaming benchmarks in that article to have an idea for what u will get for gaming
U can play Far Cry 3 at 25FPS at High Quality,720p
But since the original post was dated dec 10,2013, i think OP already quit the discussion