What do the last letters in the RAM label mean?

Question

RAM

On the citylink, I found the 8 GB AMD Radeon R7 Performance Series RAM I needed. The marking of the model is as follows: ( R748G2606U2S-UO ...). I found the same model on the dns website, but the marking was already there ( R748G2606U2S-U ). Tell me what these two letters at the end mean. Is this memory the same, what is the difference?

Answer 1

U - Unregistered, not registered.
O - OEM... supplied as part of the system and not intended for retail.
The information is not accurate, google ...