Problem with it not accepting my new ram

[madmaty]

So I have a motherboard that only supports 2GB ram I have 4x512 which it wont accept the last stick since the first total is 1536 and the last stick would put it over by 48mb so I was wondering if there is anyway to tick the comp or deactive part of the ram to get it down to a full 2GB

 

[GhislainG]

2 GB is 2048 MB, not 2000 MB.