The current generation of Mac Pro unveiled in March of this year just got quietly bumped up with a new build-to-order option.

When introduced this past spring, the 2009 model Mac Pro was the first to feature Intel’s latest Xeon Nehalem processors, before they had even been officially announced. Today, the processor received an unannounced spec bump as a build-to-order option, according to MacRumors.

Intel’s Nehalem features four processor cores on a single chip. The base-model Mac Pro features a base quad-core 2.66 GHz processor, with a 2.93 GHz option available for an additional $400. The build-to-order option that appeared today brings the speed up to a roaring 3.33 GHz for an additional $1,200.

Customers will also be given the build-to-order option of loading up their system with 2 TB hard drives, bumped from the 1 TB drives previously available. That option expands the total internal hard drive capacity of the Mac Pro to a whopping 8 TB. The Mac Pro features four internal hard drive bays, and each 2 TB drive is priced at $550.

Apple wasn’t content to only update the Mac Pro. They also quietly slipped in some new configurable options for the Xserve rack-mountable server, which also now offers 2 TB hard drives for a total capacity of 6 TB. 4 GB RAM modules are also available, doubling the memory capacity of the quad-core Xserve to 24 GB and the 8-core Xserve to a mammoth 48 GB.