I installed FC5 initially with 1GB RAM. The swap partition was set up automatically by the installation on /dev/VolGroup00/LogVol01 to be 1.91 GB. I just replaced the 1GB RAM with 2GB dual channel RAM (OCZ Platinum OCZ2P8002GK in particular), and am finding that my system is hanging after left idling a long while. It hangs with the fireworks screen saver frozen in place. This could be the new RAM DIMMs being not quite compatible with my ASUS M2NPV-VM motherboard, but I wanted to check with the group to see whether it may be because the swap is only 1.91GB and not more than 2GB, the amount of physical RAM? Thanks for any input, Khoa Ton PS: I'm running XGL/Compiz (very sexy 3D GUI) which is not production quality, but it's not hanging with my 1GB RAM in place.