Review: Athlon 64 3400+: "It's hard not to be impressed by this CPU. Despite being 'only a clock frequency boost,' the new Athlon 64 3400+ manages to deliver a very good increase in real world performance. We're used to seeing about a 50-60% relationship between clock speed increases and application performance � that is, a 10% speed bump normally nets you 5% or 6% extra performance, if that. With this CPU, the relationship is closer to 80%, sometimes more. Granted, an 8% performance boost doesn't seem like a lot, but it's more than we've come to expect from CPUs that do nothing but step up the clock rate a tick. "