Asterisk on AMD 64 bit platform

I hope this has not been covered adnausium and its just not coming up on my searches…

I’m currently running Asterisk 1.2 (with a TDM2400E) on a server (CentOS 4) that is nolonger powerful enough for the size of my PBX userbase. I am therefore planning on replacing the server.

What successes has the community had running on 64 bit (AMD) platforms?
Does documentation exist that I’m not finding?

Thanks for the help,

Works well on Opteron and Tyan Boards.

This is our standard deployment platform for 200 or more users