about SDRAM

[grassapa]

when i buy SDRAM PC133, i see stuff like "32x64" "64x64" etc etc etc, what does this exactly mean?

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[bum_jcrules]

The are talking about chip densities. Basically how much the chips can hold.

32x64 on a 168 pin module is 256MB

64x64 would have to be 512MB.

<b>"If I melt dry ice in a bathtub, can I take a bath without getting wet?" - Steven Wright</b>

 

[Oracle]

For example, in 32x64, 32=density (32Mb in this case) and 64=width of the data path (64bits in this case).
Divide the product by 8 and you'll have the total density of your module (256Mb in this case). Why 8? There are 8 bits in a byte. Some modules have a data path of 72bits, but those are ECC modules (for error correction) which are not important for a regular system.

Hope this helps!


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[Crashman]

Ah, but that's only the density of the module. This guy is running a BX chipset, there are a few companies selling 4 chip modules that won't work on his system, and others selling 16 chip modules that will, both calling them 32x64.

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