Here's a link or two from the SAM AG (v6.1)
- http://www.solarwinds.com/documentation/en/flarehelp/SAM/default.htm#../../sam/content/SAMAdminGuide-RequirementsforSola…
- http://www.solarwinds.com/documentation/en/flarehelp/SAM/default.htm#OrionSAMAGAppInsightforSQLRequirements.htm
I keep this updated pretty regularly. HTH