the first guys was Hynix. Mine (EE BN 64) is Samsung. while it likely is not the RAM itself that is the issue, it is a good marker for different batches of Turbos. thanks guys.
also, I am more than willing to flash the OTA on my bl unlocked Turbo. for science. and/or to prove samsung ram variant it safe/unsafe to update if someone can give me a update.zip