I bought a gig of pc2-4200 ram for my R52 to upgrade from 512Meg to 1.5G. It appears that the BIOS detects the memory and reports 1.5G. But linux (gentoo) does not. "top" only shows 904724k memory as does /proc/meminfo.... Does anyone have any hints as to what to do? It's Centon memory (compatible with ddr2-533 and ddr2-400)..... thanks -matt