[cctalk] IBM PC/XT and NEC "gold" tam

[Chris via cctalk]

I have an xt mobo and some portion is populated w/NEC 4116 or 4164 chips (but 
4116s were specific to the 5150, no? It's not in front of me). There are a 
bunch on the board, not sure if it's all the ram. Was this typical (I'm sure 
that wasn't the case). Is this an example of an early 5160? Why did they 
goldnplate the covers?