Re: upgrade rating
yes, but they max out around the same speed, roughly 2.7Ghz. Having a higher FSB compared to multiplier will yield higher performance. So to get 2.7Ghz, its 270x10 for the 3800+ or 246x11 for the 4200+. In this case, the 3800+ will perform better than the 4200+. But if you are going to lower the multiplier on the 4200+ to get a higher FSB, then might as well buy a 3800+ right?