You don't want to replace your motherboard yet. Your motherboard may require dual-channel memory, in which case the two sticks are dependent on each other to function, if one of them is down the second one can't function. Another possibility is that the stick failed and your computer was left with too little memory to operate and hence the blue screens of death and the freezing.
In either case the best thing to do is to take the first stick to your local Fry's electronics and get another stick of memory, they'll help you match it with one that is compatible and if this doesn't take care of the problem you can always return it.
i have gateway 5082 media center desktop computer. with windows XP on it
and recently i had a problem where my computer would freeze in like 30 sec, it would boot from the cd or the hdd but it would freeze in 30sec. after putting my brains into extream test i finally found the problem, when ever there was a memory chip on the second slot the computer kept on freezing, if i removed it it would then work just fine. so i started using my computer with out a chip in the second memory slot( on the mother board) for about a week it worked just fine but some times a blue screen came up telling me "windows is shutting down to prevent damage on your computer AND SO on" now my computer would not let me open any external hdd or falsh drive, it would recognize it but not open it. now my computer just freezes and that blue screen would come up every 5 min.
i am sick of this i am planing to replace the mother board, i would it online for 79$$ you guys think i should replace the mother board??
if i plan to replace the mother board then do i need to buy any thing else or just the mother board?
( i am sure it is not a hdd problem because i tested the hdd on the other computer)
i do have a copy of windows XP and windows VISTA