http://eshop.macsales.com/MyOWC/Upg...I=#TimeFormat(Now(),+&shoupgrds=Show+Upgrades I've been looking at the 1GB ram modules available at OWC. They list three models ranging in price from $179.99 to $229.99 (for the Samsung). From the specs I can not identify and differences between any of these modules besides the fact that the most expensive samsung one is also used by apple. What's the difference. I can't imagine there are too many companies in the world with the technology to produce chips like this. So most of these things must come from the same manufacturers right?