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Single Sided vs. Double Sided


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#1 Thoth_Dhwty

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Posted 30 October 2016 - 09:03 AM

 Alright, so this has caused some confusion about RAMS in my head. I've tried to google about it and I get all kind of different answers.

 

 Some people claim that single sided and double sided represents the memory chips of a RAM printed on either one or both sides of the stick, while other people claim that single sided/double sided refers only to the group of RAMS or rank while it doesn't matter if the memory chips are on either one or both sides of the stick.

 

 Really confusing since the name should suggest exactly what it says single or double sided. Any insight ?

 

 Thanks!



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#2 Teddy1

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Posted 30 October 2016 - 09:25 PM

Hope this helps your understanding.

 

https://en.wikipedia.org/wiki/DIMM



#3 Thoth_Dhwty

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Posted 31 October 2016 - 06:56 AM

 This is what I get from wiki

 

 

 

 

DIMMs are often referred to as "single-sided" or "double-sided" to describe whether the DRAM chips are located on one or both sides of the module's printed circuit board (PCB).

 

And this is what I get from other places

 

 

 

The "sided" reference has nothing to do with whether there are chips on either side of the stick. It's referring to the number of banks (either 1 or 2) and has nothing to do with chip placement. 

 

 

Single sided dimm

1. is a 64bit wide group of chips by definition
2. has 1 rank (1 rank is the 64bit group mentioned earlier)
3. can have chips on both sides of the stick
 
Double sided dimm
1. is a 128bit wide group of chips = 2 ranks 
2. can have chips just on 1 side of the dimm 


#4 Teddy1

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Posted 31 October 2016 - 07:39 AM

DIMMs are often referred to as "single-sided" or "double-sided" to describe whether the DRAM chips are located on one or both sides of the module's printed circuit board (PCB). However, these terms may cause confusion, as the physical layout of the chips does not necessarily relate to how they are logically organized or accessed.

JEDEC decided that the terms "dual-sided", "double-sided", or "dual-banked" were not correct when applied to registered DIMMs (RDIMMs).




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