How do define a memory is high density or low density? is (16x8) 16 chips 256mb high density?

[XMLEngineer]

How do define a memory is high density or low density? is (16x8) 16 chips 256mb high density?

 

[Kingofcomputer]

those vendors define 32x4 as high density,
which is wrong.

32x4 and 16x8 both are 128Mbit,
they're same density,
they're just different architecture,
32x4 is 8M x 4bit wide x 4 bank,
16x8 is 4M x 8bit wide x 4 bank,
that's why they call 32x4 "high density" because of 8M vs 4M.

if you're comparing a 128Mbit chip to 64Mbit chip,
you can say the 128 is high density, 64 is low density.