For some light reading, see:

http://publib.boulder.ibm.com/infocenter/systems/index.jsp?topic=/com.ibm.idataplex.doc/dg9idp_r_serverpubs.html&resultof=%22%69%64%61%74%61%70%6c%65%78%22%20

http://publib.boulder.ibm.com/infocenter/systems/topic/com.ibm.idataplex.doc/dg1bfmst.pdf

http://publib.boulder.ibm.com/infocenter/systems/topic/com.ibm.idataplex.doc/dg9idp_r_rack.html

http://publib.boulder.ibm.com/infocenter/systems/topic/com.ibm.idataplex.doc/dg9idp_r_hx.html

http://publib.boulder.ibm.com/infocenter/systems/topic/com.ibm.idataplex.doc/dg9idp_r_server.html

http://publib.boulder.ibm.com/infocenter/systems/topic/com.ibm.idataplex.doc/dg9idp_r_pdu.html

http://publib.boulder.ibm.com/infocenter/systems/topic/com.ibm.idataplex.doc/dg9idp_r_dx340ug.html

http://publib.boulder.ibm.com/infocenter/systems/topic/com.ibm.idataplex.doc/dg9idp_r_dx340pdsg.html

Spec.org benchmark results:

http://www.spec.org/cpu2006/results/res2008q2/cpu2006-20080422-04135.html

http://www.spec.org/cpu2006/results/res2008q2/cpu2006-20080422-04134.html

http://www.spec.org/cpu2006/results/res2008q2/cpu2006-20080422-04132.html

http://www.spec.org/cpu2006/results/res2008q2/cpu2006-20080422-04133.html

http://www.spec.org/cpu2006/results/res2008q2/cpu2006-20080422-04131.html