well i tried to install a new ram ddr2 2gb 800mhz to get 3gb i had 1gb533mhz in other slot in a motherboard asrock g41m-vs2 but when i put it it just dont boot up
i tried my old ram in both slots worked fine. but when i tried just the new ram doesnt boot. tried in both slots too and alone.

my system specs.
windows xp PRO sp3
ddr2 1gb ram 533mhz
pentium D 805 2.6ghz fsb 533