hellooo folks !!! i think i have a problem .... i am running on 512 mb RAM ie (2*256); i am using windows-xp sp2 my problem is with the amount of ram left unused , it is generally 220 mb but all friends running on single chips of 512 mb get something like 350 mb unused ; we have the same programs installed; so what is the problem; is it with the dual porting of the ram to get a faster system ; or is there any prob with the ram chips please tell me !!!!!!!!!