Kindle 2 Teardown
K4X1G323PC is IMHO a 128MB chip:
it has 1G density and it's internal organization is x32, what makes it a 32Mx32 according to this document: http://www.samsung.com/global/system/bus...
But still, 1Gbit / 8 = 128MB.
nevertheless: you would not expect less than 128MB paired with such a processor installed...
Correct me if I am wrong.