It's not a dual core but I just upgraded my grandfather from a Phenom II X4 925 (2.8GHz) to a Phenom II X6 1055T (2.8GHz turbo to 3.3GHz). Even he noticed the performance boost. The system already had an SSD but it boots faster and loads programs and web pages faster. All he does is craigslist, Facebook marketplace, and a few other sites. So I'd say the extra cores help these days.
It's not a dual core but I just upgraded my grandfather from a Phenom II X4 925 (2.8GHz) to a Phenom II X6 1055T (2.8GHz turbo to 3.3GHz). Even he noticed the performance boost. The system already had an SSD but it boots faster and loads programs and web pages faster. All he does is craigslist, Facebook marketplace, and a few other sites. So I'd say the extra cores help these days.