Single sided and double sided Ram?

[AceJapanman]

I was up at my local shop here in Kyoto and the retailer was selling some PC 100 128 module Cas 2 Ram but one of them was the regular double sided stuff but the other stuff had all the ram on one side of the chip. He said the first one was a 64mbit module and the single sided one was 128mbit. This is not MB since both were 128MB modules. Can anybody clarify the difference between the two chips? Do you think it matters in terms of performance? He was selling them both for the same price so I guess there is no performance difference.

 

[wj]

If its got the chips on one side of a 128Mb stick that is 8 - 16mb chips to = 128mb. If it has 8 chips on both sides is has 16 - 8mb chips to = 128mb. I don't know if there any performance different in the two.

Maybe this will help you.


wj 😎

 

[Noriaki]

like wj said, 16MB is 128Mb, 8MB is 64Mb so it's either 8 128Mb chips, or 16 64Mb chips (note: b = bit, B = byte)

 

[Slacker]

Some mother boards (mine is one of them) are limited on the number of rows of memory they can address, The MSI i815e PRO has four dimm slots but can only address four rows of memory, so, if I put two double sided dimms in there I could not use the other two slots that would be left open. 🙁

So I have to try to find single sided modules or high capacity double sided modules to get the most ram possible in there, right now I have one 256 meg stick that is double sided, I could add another double sided module or two more single sided modules.

 

[EvilDonnyboy]

Also, single-sided sticks produce less signal noise, so a single-sided is likely to OC higher and more stabilly than a double-sided.

 

[AceJapanman]

I think I got it guys, thanks. Also, I'm curious if these single sided chips are common or not. I checked out Mushkins and there's no mention of a Dimm with a 16MBx8 module package. I guess this kind of configuration is something pretty new to 128MB dimms, right?

 

[Noriaki]

It's not new, and it's not rare exactly, just not as common as double sided.

 

[Lord Evermore]

Single sided uses higher density chips, which are more expensive to manufacture, which means the modules usually cost more.