what do you think about that what would be the best cpu configeration for playing latest games under rs.15000-20000
I'm not sure there is any cpu for your current motherboard that can really handle the latest games. You might be better off building a new computer (though you might be able to re-use a few things like the case and hard drive). With a budget that tight (presuming you mean Indian Rupees, in which case 20000 converts to about 315 US Dollars), others might be better able to help you than I would. I suggest you start a new thread with a filled-in copy of this template: http://www.tomshardware.com/forum/353572-31-build-upgrade-advice