The Core 2 Duo processor line ranges from the 1.86-GHz E6300 chip ($183) with 2MB of cache to the 2.93-GHz Core 2 Extreme X6800 chip ($999) with 4MB of cache; all have a 1066-MHz system bus. (Intel leaves the "Duo" designation off of its X6800 CPU.)Though Core 2 Duo chips use the same Socket 775 interface as current Pentium 4 and Pentium D chips, they require new chip sets, so you'll have to get a new motherboard--you can't just pop a Core 2 Duo chip into your existing Intel-based PC and reap the tremendous performance gains. The Core 2 Duo reference systems we tested used a motherboard with Intel's 975X Express chip set (boards using the P965 Express chip set will also be available); nVidia and ATI have their own Core 2 Duo boards as well.
The new processors and systems will be on sale from various vendors beginning July 27, with some configurations of Core 2 Duo machines checking in at surprisingly reasonable prices.
