Am trying to add a 512mb of pc133 to my GA-7ZX board. After I add the memory and restart, the initial screen shows my new memory count. When windows 98 begins to start I get an NTKERN Windows Protection error, it then tells me to restart. I have tried restarting in Safe Mode.....no good. This is the second stick of brand new 512mb I have tried to install. So I am pretty sure the memory is okay. Thanks, GC