Waiting for the 27" iMac to arrive sometime at the end of the month, picked up a great deal on 16GB of memory for the iMac. However wanted to test it before it got here in the event they were DOA. The only other machine I can use to test is a 2009 13" MacBook Pro that supports DDR3 PC-8500 1066Mhz and the new modules I have are 4GB (x4) DDR3 1333Mhz modules. would I get an accurate reading if i tested them out in the 13" 2009 MBP? or will there be expected errors? thanks!