windows 7 64bit only showing 3.75gb of ram in use

[liamcrane]

hi guys just curious to know why my windows 7 system manager is saying only 3.75gb of my 4gb memory is being used i thought windows would support up to 16gb thats what my board max is im going to try updating the bios to see if this solves the problem if not any ideas to why this is happining?

Many thanks

 

[liamcrane]

im using on board graphics at the mo and from wat u just said i think that could be the problem i have sent my 260 gtx card off to be repaird and when i checked my ram with the card in it was showing 4gb