Attached Link: http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2534278&page=1

There are some good ***low and high*** settings listed here in this old thread by me(and my sick pc)Good descriptions by blackhearted of what rendersettings actually do.

This thread by unzipped is very informative too.

http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2645790&page=1