Since the start of processor family’s the only thing you can really rely
on about speed is:
“Hardware developers will change the fastest sequence for some set of
operations for every new model, then complain when all the software out
there does not immediately adopt the changes”.
Don Burn
Windows Filesystem and Driver Consulting
Website: http://www.windrvr.com
Blog: http://msmvps.com/blogs/WinDrvr