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32x64, 16x8, 32x72...?!?!?!

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JohnnyTheRed

Member
Joined
Aug 9, 2002
Location
Brockton MA
What do these numbers mean, with regards to memory?

When looking for RAM, you might come across something to the effect of:

CRUCIAL MICRON 256MB 32x72 PC 2100 DDR RAM

OR

MICRON/MICRON ORGINAL 256MB 32x64 PC2100 DDR RAM, 184-Pin, CL=2.5-Unbuffered 2.5V

What exactly do those numbers mean :/
 

NookieN

Member
Joined
Jul 14, 2002
Location
The West
The first number is the number of memory banks (in megs). The second its the width of the memory itself (in bits). So 32x64 is 32*1048576*64 = 2Gbit = 256MB.

If it says 32x72, that means the memory has a parity bit (i.e. has some error checking ability).

Usually these numbers aren't very useful. Occasionally you'll find a motherboard that can't support a certain memory density, but that's rare these days.