[ltp] single-bank vs. double-bank RAM

[Laurent Gilson]

Hello

> Does anybody know if there's a disadvantage for my thinkpad, when the
> second DIMM is labeled "Single-bank Connection"?

No, the TP will not bother.

> - I don't even know
> what this Double-vs.-Singe-bank-thing means...

(1 Byte = 8 Bit)

Double: 16 logical chips, each storing size/2 Bits. (512 MB => 16x 256MBit  
Chips)
Single: 8 logical chips, each storing size Bits. (512 MB => 8x 512MBit  
Chips)

On normal SD and DDR you can simply count the chips. On NotebookRAM things  
are a bit more compilcated. The visible chips contain multiple internal  
chips.

All in all the motherboard needs to know and support the chips. That's a  
bit of a problem to figure out since some boards support single 512  
MBit-Chips but not double 256 MBit-Chips or vice-versa.

cu