PAE and HP reported performance hit

[Teo Gomez_1]

I've got Exchange 2003 servers (win2k3 SP1) reporting 3.5 GB of RAM. I'm assuming it's because PAE has not been turned on as stated in HP's advisory:
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=PSD_EL041214_CW01

The advisory mentions that there is a performance hit. Anyone know what this is?
quote from advisory - "HP recommends that this memory not be used due to the performance loss that occurs when using PAE mode"

[Igor Karasik]

Teo,

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=799139

http://msexchangeteam.com/archive/2005/12/14/416065.aspx

Bottom line: PAE switch CAN affect performance, but all recomendations say: use PAE switch.
Furtermore, PAE switch is enable by default in windows 2003 sp1 (all editions) if CPU support DEP.

[Igor Karasik]

Remove
from second link

http://msexchangeteam.com/archive/2005/12/14/416065.aspx