Apple today quietly upgraded the Mac Pro and Xserve with a handful of feature upgrades. The single-processor Mac Pro now has the option of a 3.33GHz quad-core Xeon, pushing its clock speed up past a fully-equipped eight-core version's 2.93GHz limit. The Xserve has also been upgraded to accept 4GB RAM sticks and can recognize as much as 24GB of RAM in the single-processor version and 48GB in the dual-processor model.
