bit-tech.net has posted a review on Intel's 965 Extreme Edition CPU

The 965 comes clocked at 3.73GHz (14.0 x 267MHz) with a 1066MHz front side bus - this is the same core speed as Intel's fastest single core Extreme Edition processor, the Prescott-based chip that came with 2MB of L2 cache. Since there are two separate 'Cedar Mill' cores on the same package in order to create the Presler chip, Intel is able to benefit from fantastic yields as they're able to collect two 65-nanometre Cedar Mill cores from anywhere on the wafer and install them on the same chip package.

Intel's 965 Extreme Edition Review