Quote Originally Posted by informal View Post
Like keithlm said ,probably drivers.
One can also use NV based board for AMD system and test it with Radeons and NV cards to see if chipset is the culprit.
I should expound:

In the last 6 months or so there have been one or maybe two times ATI has claimed they were adding performance improvements for multiple CPU. But it definitely seems to be a work in progress.

NEXT QUESTION: Does this trend also pertain to Crossfire vs SLI?