IC in parallel

[Dimitree]

so better not stack chip at all, what if I use a corwood construction as posted above?

[amptramp]

I like your idea of socketed cordwood, but I don't want to be the person who has to put the pins in the sockets while maintaining ESD protection.  It is sort of like assembling a spoked wheel - you have to hold all pins on one side in the exact correct position before you put the components together.  But it does give you the most compact assembly, if that is the driving criterion.

[iccaros]

you could also as stated before place one chip on one side of a PCB and one on the other. then you take up the space of two chips for four. the chips would off set so that the row of pins is between each other. you would have to draw this out.. If I get some time may give it a try... multilayer boards make this easy.. 
you could also stand like an arduino, where you have "shields"  so for each dram chip you have holes where pins for a board that would sit above it.

But first I would get this built in breadboard, as this is a physical construction challenge that does not matter until you get the other electronic parts solved. Even if you have a working schematic, placement of digital parts is important, you can learn a lot about how you need to arrange things from a breadboard design.

[Dimitree]

thanks for the help guys
I give it a quick try with a single side board, 16cmx10cm (the max that I can build for my self)
I come up with this (looking at EH 16 second pcb style):

http://imageshack.us/photo/my-images/535/30512476.jpg/

I jumpered IN and OUT pins for every DRAM (only IN jumpers showed here)
I should add a blocking cap on each power pin too.
could this design be better than coorwood or stacking?