ZDNet is reporting that the next iteration of the Mac Pro will be unveiled next Tuesday, March 16th. Their sources indicate that Intel's new 'hexacore' Core i7-980x chip, which is also expected to be launched next Tuesday, will be in that machine.
Code-named "Gulftown" the 32nm, six-core i7-980X will be labeled as the i7x ("Extreme Edition"). It will be the first dual-socket, six-core processor from Intel. With 6 cores and 12 threads, a dual-configured, i7-980X Mac Pro will sport 12 physical cores and 24 logical cores with a top frequency of 3.33GHz.
Excluding the minor speed bump in December, the Mac Pro has not been updated for over a year. In December we reported on the leaked Core i7-980X specs. Two months later, HardMac reported that the new i7x Mac Pros could be delivered in February. With the launch of the i7-980X on Tuesday combined with HardMac's sources indicating a Mac Pro refresh that day as well, the i7x seems like a lock for the updated Mac Pro. However, as MacRumors points out, Apple has typically used server-branded Xeon chips in its Mac Pro line, and Intel is expected to debut a number of new Xeon 5600-series chips on Tuesday as well, notably Intel's 2010 flagship chip – the Xeon X5680.