Hi, Bought corsair ram and upon installation got the beeps that signal no ram installed. Have tried different configurations but no joy getting either 8GB stick to work. Original ram works fine. Clearly states on the package that it is compatible. Have installed mactracker and it says 16gb works in my MBP. The new ram is 1333 not 1066 but I would think that it would just run at 1066 and not make it so it is not recognized. If the speed is the problem is there any way to provide a fix for that or do I just have to shell out more $$ for lower speed ram? Thanks for any help.