I can't find anything saying what core it is, but here are the specs on the processors.
PROCESSOR TYPE : XEON
CLOCK SPEED : 2.2 GHZ
L2 CACHE SIZE : 512 KB
FRONT SIDE BUS : 400 MHZ
ARCHITECTURE : INTEL NETBURST MICROARCHITECTURE
TECHNOLOGY : 0.13 MICRON
FORM FACTOR : INT - MICROPGA
SOCKET TYPE : SOCKET 603
PLATFORM : PC
FEATURES : HYPER PIPELINED TECHNOLOGY (HPT)
As for what it's uses are gonna be: A little bit of everything. I am a photographer, so I do alot with pics, but I also dabble in video. I don't play many PC games. I'm in college, but I work for my cousins IT company, and I will be doing work with remote servers and I know as far as calcs go, the Xeons fly.