Windows 98 only supports up to 768mb of memory after that it starts to slow down the pc or cause problems, it could be that they are 2 difrent makes but i doubt it its more likely to be a dodgy sim if any thing. Ive had boot problems because of a sim which isnt much good have you tried the 2 sims on their own . Avoid installing xp its got lots spyware in it which sends out to microsoft if anything get windows 2000 its much better than xp. :-)
