First noted by AppleInsider, the 3.33GHz quad-core Intel Xeon option will add $1,200 to the price of the base configuration, which currently sells for $2,499. An option for the 2.93GHz processor, introduced in March, is still available for an extra $400 over the base model.
The current Mac Pro base configuration ships with a 2.66GHz quad-core Intel Xeon "Nehalem" processor.
The custom configuration options for the Mac Pro also enable buyers to add up to 16GB of RAM, as many as four 2-terabyte hard drives, and a variety of graphics cards, in additional to other components and software.
When it introduced the Intel Xeon-based Mac Pro in March, Apple added options for the Nvidia GeForce GT 120 and the ATI Radeon HD 4870 graphics cards, as well as three channels of memory designed to cut latency by up to 40 percent on the machines.