The Tech Report posted a report on the AMD Phenom processor

Since AMD's Phenom launched last November, the processors' uptake among enthusiasts hasn't been quite as, er, phenomenal as AMD might have hoped. We think there are several reasons for this apparent disinterest, including sketchy information on Phenom compatibility with existing Socket AM2 motherboards--especially those based on Nvidia chipsets--and questions about whether the user can disable the performance-sapping TLB erratum workaround. Fortunately, the firm seems to have taken these problems to heart. The CPU maker decided to compile a much more exhaustive list of motherboards from major manufacturers that have Phenom support and/or an option to disable the TLB erratum fix.

Phenom compatibility, TLB workaround options exposed