Intel has learned from its overly optimistic view of Pentium 4 scaling and designed a new core architecture that simultaneously focusses on performance and energy efficiency, which, we suppose, is the Holy Grail of consumer-level computing.
It's difficult not to be wholly impressed with Intel's Core 2 Duo processors. The micro-architecture leverages a bunch of smart technologies that come together to form the most potent range of CPUs available. Putting it in some kind of context, the next-to-bottom model, E6400, costing $220, is, over the course of our benchmarks, as fast as an AMD Athlon 64 FX-62 or Intel Extreme Edition 965. That, readers, is how good Core 2 Duo is.
What's equally as impressive as sheer performance is the fact that Intel has managed to architect such power into an energy-efficient package that puts out half the TDP of the two aforementioned high-end CPUs. Even the Extreme Edition, clocked in at 2.93GHz and multiplier-unlocked, ships with a 75W TDP. We suppose it's like buying a faster, more powerful car that also gives better fuel economy than your current model. A win-win situation.
We also like the fact that Intel, unusually, hasn't jumped on to a different form-factor with the release of a new architecture. You can simply slot a Core 2 Duo in a number of LGA i975X boards or opt for a 965-Express version. Intel also assures us that it will have high-volume Core 2 Duos immediately after launch, so you won't have to wait long to get your mitts on one.
Intel, then, has moved the goalposts as far as consumer-level CPUs are concerned. Its low-end Core 2 Duo parts are more than a match for anything that has come before and its high-end models, headlined by the Core 2 Extreme X6800, have absolutely no peer.
Architecturally speaking, AMD's Athlon 64 AM2 range hasn't changed an iota from yesterday to today. However, with Core 2 Duo soundly beating it in performance it's looking a lot less attractive. AMD needs to take a sledgehammer (pun intended) to current pricing if it is to remain competitive. Right now, if you're thinking of upgrading your PC and want the best solution possible for your money, you need to turn to Intel and not AMD. The empire has struck back.
It would be tempting to give the Core 2 Extreme X6800 the overall award. However, taking into account price vs. performance that award belongs to the Core 2 Duo E6400. It's a £150 CPU (once we factor rip-off Britain in the equation) that gives an Intel E.E 965 and AMD Athlon 64 FX-62 AM2 bloody noses - we love it!