Regarding more Ram on Efika...

I'm not thinking about Efika board itself. I'm just trying to learn how it could be done on a theoretical basis. I'm just thinking of the 5200B and ram here. (eliminate Efika from the thinking process for a bit)

There seems to be a 4chip limit with 5200B and that they have to be within 5cm of cpu. It also seems that 4 ram chips could be utilized on a single CS -or- 2 ram chips per CS for a total of 4. Is this right?

So (in theory), 4 of the current K4H511638C-UCB3 could run on CS0? And that would total 256MB.

My question still is, what is exact configuration within Efika? Yes 2 chips totalling 128MB. I am assuming using CS0 only.

I see only 512Mb chips in this Samsung ram chip series, so if this series still used, then 256MB = theoretical max possible with 4 chip maximum limit of 5200B. Obviously if 1024Mb chips of different chip series used then 512MB possible. Is this right?