What's the difference between these two memory models

Friend wants to upgrade their Dell Inspiron 4000 which takes the following
memory:

SDRAM, PC133 . CL=2 . Non-parity . 133MHz . 3.3V . 32Meg x 64 . 144 pin

If I wander down the memory on Crucial's site using the above as the spec,
you end up here:

http://tinyurl.com/mqj22

but if you use the memory advisor tool, you end up here:

http://tinyurl.com/m98bl

The only difference (apart from the price of course) is in the part code:

CT32M64S8W7E (£31.71) (manual lookup)
CT32M64S4W7E (£51.69) (memory advisor)

I tried to find a part that describes the Crucial part code naming
convention to try and work out what the "4" and "8" mean. I'm suspecting
it's chip density.

Any ideas?

Thanks, Rob.

 

The information 32MBx64 is obviously wrong. 256MB = 32MBx8. The '64' may come
from the bus width. So can the configuration information be trusted? Maybe
one is 32MBx8 and the other is 64MBx4, that could explain the numbers 8 and 4?

 

It's only a free phone call away - 0800 013 0330 - so ask directly.

 

crucial only guarantees their memory to work in a specific computer if
you use there memory advisor, which will give you certain part numbers
specific to that brand+series.
the chips could be the same, but for each series of a computer, it is a
different part number, that's how they know you are using the right
chip. and some times, the prices are different based on supply and
demand. i find that the "non specific chips" are a little cheaper from
crucial. do it both ways and use some common sense.