hi folks after the discussion came up a while ago here on element14 about EOMA68 i thought you might appreciate knowing that the crowdfunding campaign will start tomorrow and run for two months. i have a heck of a lot to do so here are a couple of links http://crowdsupply.com/eoma68 and http://rhombus-tech.net/crowdsupply/ - we'll have a micro-desktop housing, a 15.6in laptop housing and a computer card with 2gb RAM, 8gb NAND and an Allwinner A20 dual-core ARM Cortex A7 running at 1.2ghz.
ok after reviewing current shenzen prices of 8 gigabit DDR3x16 RAM ICs ($9 in qty 500) vs 4 gigabit DDR3x8 RAM ICs ($2.95 in qty 500) the cost of putting in 2 GBYTEs of DDR3 RAM at this 800/1033 mhz level would be a whopping $18 using the planned 2x DDR3x16 ICs compared to $12 for 4x DDR3x8. we can't use more common DDR3x16 1600mhz or greater because they won't go down to the 800mhz level which we'll need for both power-saving as well as "play it safe" reasons...
... so ironically i will be sticking with the original design and just adding an extra address line. so this is very similar to what is on the Cubietruck (aka Cubieboard 3). the Reference Design that everyone is working from only had 14 address lines for the 4x DDR3x8 which only allows up to 1 GBYTE memory addressing... i'll have to squeeze in an extra address line somehow! should be ok... 
ok after reviewing current shenzen prices of 8 gigabit DDR3x16 RAM ICs ($9 in qty 500) vs 4 gigabit DDR3x8 RAM ICs ($2.95 in qty 500) the cost of putting in 2 GBYTEs of DDR3 RAM at this 800/1033 mhz level would be a whopping $18 using the planned 2x DDR3x16 ICs compared to $12 for 4x DDR3x8. we can't use more common DDR3x16 1600mhz or greater because they won't go down to the 800mhz level which we'll need for both power-saving as well as "play it safe" reasons...
... so ironically i will be sticking with the original design and just adding an extra address line. so this is very similar to what is on the Cubietruck (aka Cubieboard 3). the Reference Design that everyone is working from only had 14 address lines for the 4x DDR3x8 which only allows up to 1 GBYTE memory addressing... i'll have to squeeze in an extra address line somehow! should be ok...
