High density RAM? or Not?

[odelayih]

Can someone tell me if this is high density RAM or not? Specifically, will this RAM work in my 6400 Server?
Mushkin: 256mb PC133 Registered ECC w/IBM 32x4

 

[Desmoquattro]

ummm...i dunno...i'm really confused but i think it's low density because of the x4...and high density is supposed to be x8 and x 16?...sorry not much help.

 

[datallah]

It actually it is the opposite... 32x4 means that there are 4 chips ... so they must be higher density than if there were 8 or 16

 

[Kingofcomputer]

all wrong!!!

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.

you need to dig in manufacturer's datasheet to find out how many chips,
they don't put it on the product description or part number.

32x8 = 8M x 8bit x 4bank = 256Mbit (1 chip)
64x4 = 16M x 4bit x 4bank = 256Mbit (1 chip)
8 chips of it makes up a single side 256MB DIMM,
16 chips of it makes up a double side 512MB DIMM.
above number is chip type.

64x64 or 64x72 is the configuration.
512MB DIMM is 64x??, 256MB DIMM is 32x??.
??x64 means regular, ??x72 means with ECC.

 

[Desmoquattro]

i'm still confused...oh well...he's the one that helped me out last time too...lol.