howdy,
i was in a similar situation as you about a month ago, in january.
i have a dell server with xeon 3.0 EM64T and intel E7520 chipset.
I had a dog of a time trying to get my onboard intel pro/1000 MT server
adapter NIC driver, none of the microsoft or intel drivers worked. everything
else seemed to be fine, but what good is no networking huh?
but a good post at the newsgroup below, helped me to find a working beta
from compaq that did the trick like magic!
I called and emailed Dell, Intel, and MS support and they were all pretty
much blowing it off as beta, with no real solution. gotta stick to the users
at the newsgroups for this kinda answers.
my winxp 64 built in drivers do support my onboard SATA, but i too wanted to
see if there was a intel chipset package specific for x64 and there was on
the intel web site. it fixed a usb controller problem in device manager for
me, that wasnt working with the microsoft xp x64 default drivers.
so see if they have one for your chipset:
http://downloadfinder.intel.com/scripts-df/support_intel.asp
http://support.intel.com/support/motherboards/workstation/
it seems that intel is focusing on the itanium and was excluding my xeon
from a lot of x64 drivers.
otherwise, post your situation at the microsoft discussion:
http://www.microsoft.com/windowsserver2003/64bit/x64/trial/support.mspx
you can find my posts there by searching the From line: wewa
for 2005
make sure to load antivirus ASAP, as one of my posts will reflect.
clamwin.com is good.
good luck!