Duo Memory upgrade

Unfortunately the ram that is available today is like playing roulette. They used to maintain an HCL for memory, but the manufacturers of the modules started changing components without changing model numbers with the result that the older versions would work but the newer versions of the same model number did not. If you are using your Duo as a straight file server, you may not find any real impact. I had an NV+ and had the strange circumstance that the 1GB memory module from an HP laptop, circa 2004, worked just fine. I noticed no impact on file transfer speeds. When my new laptop died and I had to go back to the old one, I reverted back to the original 256MB module that came with the NV+.