I've bought a secondhand processor and also got two tagless 1GB DDR2 RAM for bargain. They dont fit in my DC 7700 HP's 404673-001 motherboard with the Intel Q965 Express chipsets, that support non-ECC DDR2 PC2-5300 (667-MHz) and PC2-6400 (800-MHz) memory.
Here it is >> http://i.imgur.com/4RRMFap.jpg
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
RAMs fit to slots, but are MB incompatibile, system doesnt boot.
First owner has Asus P5k MB, so i've presumed these are 1067 RAMs.
I cant find exact part from Cin17 post, but if it is really ECC or 537 RAM, it might explain where problem is. Would really like to know exactly which modules i have, because of reselling!