With pretty much any SQL database, if you just have the one process running your bottleneck is disk I/O and NOT cpu cycles.
I think if you check the specs on the machine you will find one of the following:
- There was query caching in the faster one
- There were other processes running in the slower one
- The hard drives were different
- The indexes were different
- There were flags set differently on the server itself
There are so many configuration options that affect the speed of SQL Server, it's almost impossible to compare apples to apples unless you copy EVERYTHING between machines.
EDIT
Found two links in MS KB regarding issues with AMD processors (one specifically with the opteron):
Link One
Link Two
Both are related to the time stamping function.
1Are they on the same machine ? Do they have the exact same hardware ? Do the 2 systems have the same databse with the same contents and same indexes and same hard drives ? Without these info, its impossible to say. – Sathyajith Bhat – 2010-09-02T15:12:11.113