So, on Samsung and Hynix chips, after the usual info like 4GB R2x8 PC3-12800 there is a 11-11-A1 or 9-10-B1. Any idea what that means? I'm trying to start selling RAm on eBay, but not sure if i should separate RAM modules by those identifiers (much more work) or not (much easier).I googled around, but couldn't find any information. Any help will be appreciated.