About the only info I can give you about those is they are manufactured by Micron Technology http://www.micron.com/products/dram/ddr2-sdram#fullPart
Good luck finding which part specifically - I got nowhere. The big problem I found is Micron supplies ram chips (and modules) to other brands such as Crucial, HP and Dell, perhaps more. Without any label, hard to say what modules those are.
It's a start anyway