Pavilion does not recognize 2nd RAM chip

[DoctorJ]

I bought NB w/ two 512 mem chips, then bought & installed two 1GB chips. Computer reports only 9xx MB memory. I'm sure there is an easy way to correct this, but I don't know it. I'm also sure that you can tell me how to do it. Thank you. doctorj

 

[brite750]

what model pc, the best way to get ram is to go to crucial.com plug your make/model into there ram finder thing, it will tell you what type is compatible with your machine. then you either buy it there or look around for the same type