I have an old Acer Aspire 4920 bought in 2008 or so with 1GB RAM, Intel Core 2 Duo processor. I had windows 7 on it. I erased it for obvious reasons and installed Ubuntu 16.04, but later felt its slow and 16.04 recommends 2GB RAM. So I erased it and installed 14.04 64bit which recommends minimum 512MB. I thought it will be fast because my RAM is double the minimum requirement. Unfortunately, it is slow as well. Does anyone know why? Is the RAM too low or should I try 32bit version? Please help.