I have a question on memory. Iím building a system around an Asrock M3A770DE. On their allowed memory list:
http://www.asrock.com/mb/memory/M3A770DE.pdf

It says the memory I want, that is allowed is:

2G G.SKILL F3-12800CL7D-4GBBHZ
2GB G.SKILL F3-12800CL7D-4GBPI
2GB G.SKILL F3-12800CL9D-4GBNQ


Now, here is my question, the memory I have in my newegg shopping cart, in a combo deal with another item I need is:

2GB G.SKILL F3-12800CL9D-4GBRL (combo w/ Antec EarthWatts EA650)


I see the "12800CL9D" is a match but the two memories have the ending code different, the top one is 4GBNQ and the one I have in shopping cart is 4GBRL.


I don't understand the difference, and should I consider not purchasing the G.SKILL F3-12800CL9D-4GBRL because its not on the memory list and go with the G.SKILL F3-12800CL9D-4GBNQ instead?\

Little confused....