the only case of this I know of is some board only read 3 gigs if you put 4 1gig sticks in a handful of boards, and besides, it's beeping at him which is like the most telltale sign that your ram is bad evermeanman said:it might be the memory stick or if putting it in your pc means there are 3 sticks in your pc it might be that some mobos only work with 2 or 4 sticks not 1 or 3