Mystery Elpida IC + G.Skill, Round Two.

I took a chance on a 2014 kit of F3-12800CL6D-4GBPI on eBay, listed as new in the box. I could see the serial from the photos, 14151800, indicating Elpida chips, and they definitely appeared to be double-sided.



I got them in today. Looking under the spreaders initially, I was surprised to see white stripes on the ICs. Heated them and pulled the spreaders off.




They're definitely 1Gbit xxSE chips, and looking at the code, the key letter is "B". These are either BBSE or EBSE. No idea how in the world such ICs are showing up on 2014 kits (I assume this was an RMA replacement for the original owner similar to ihog6hog's post above).