What's the difference between these dual channel kits? They both cost the same but one is 2133mhz and the other is 1866mhz?
Links
http://www.pccasegear.com/index.php?main_page=product_info&cPath=186_538_913&products_id=18602
http://www.pccasegear.com/index.php?main_page=product_info&cPath=186_538_913&products_id=17522
Links
http://www.pccasegear.com/index.php?main_page=product_info&cPath=186_538_913&products_id=18602
http://www.pccasegear.com/index.php?main_page=product_info&cPath=186_538_913&products_id=17522