well it's not exact, but your roughly talking about a 20% increase in just IPC alone. The x4 has a higher clock rate, but the 1200 does more with a lower clock speed. Gaming will be about 20% better. Multicore workloads is a bit less, about 10%, because the x4 does have four cores too. But gaming for example would be a lot smoother with the Ryzen. You obviously need a new mobo/ram to accopmany the Ryzen. But it's worth it. Gives you an upgrade path too. Plus the Ryzen is overclockable.