RN516 Memory Upgrade

I thought they were exactly the same except the CPU compatibility part. I think the 314 has only 2Gb so this is clearly possible even with intel CPU. The point I wanted to make is that network is likely to top before ram, and disks can't go any faster than they are meant to, most disks get to 100-110Mbytes/s, so the NAS is bound to be limited to around 600Mbytes/s with that (unless using SSD) and I think the 516 has 2 gigabit cards that would limit it to 240Mbytes/s anyway, far far away from the ram limit, even if you get 20 concurrent connections. CPU should be able to handle that speed too even with antivirus on, it may have trouble if there is encryption + antivirus (and I'm not even sure about that).
This means that I don't think that upgrading RAM is a useful thing to do. CPU makes more sense, but I'm not sure this is useful either.